diff --git a/module/zstd/lib/common/allocations.h b/module/zstd/lib/common/allocations.h
index 5e8995501..d5bec6748 100644
--- a/module/zstd/lib/common/allocations.h
+++ b/module/zstd/lib/common/allocations.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/common/bits.h b/module/zstd/lib/common/bits.h
index f452f0889..1804747a4 100644
--- a/module/zstd/lib/common/bits.h
+++ b/module/zstd/lib/common/bits.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/common/bitstream.h b/module/zstd/lib/common/bitstream.h
index 6ff482a83..7e4cc2f0c 100644
--- a/module/zstd/lib/common/bitstream.h
+++ b/module/zstd/lib/common/bitstream.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * bitstream
  * Part of FSE library
diff --git a/module/zstd/lib/common/compiler.h b/module/zstd/lib/common/compiler.h
index 1f7da50e6..0b6aaf087 100644
--- a/module/zstd/lib/common/compiler.h
+++ b/module/zstd/lib/common/compiler.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/common/cpu.h b/module/zstd/lib/common/cpu.h
index 3f15d560f..0cd7aa09c 100644
--- a/module/zstd/lib/common/cpu.h
+++ b/module/zstd/lib/common/cpu.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/common/debug.h b/module/zstd/lib/common/debug.h
index 4b60ddf7f..949f64c83 100644
--- a/module/zstd/lib/common/debug.h
+++ b/module/zstd/lib/common/debug.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * debug
  * Part of FSE library
diff --git a/module/zstd/lib/common/entropy_common.c b/module/zstd/lib/common/entropy_common.c
index e2173afb0..108effa53 100644
--- a/module/zstd/lib/common/entropy_common.c
+++ b/module/zstd/lib/common/entropy_common.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * Common functions of New Generation Entropy library
  * Copyright (c) Meta Platforms, Inc. and affiliates.
diff --git a/module/zstd/lib/common/error_private.c b/module/zstd/lib/common/error_private.c
index 7e7f24f67..3345ca464 100644
--- a/module/zstd/lib/common/error_private.c
+++ b/module/zstd/lib/common/error_private.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/common/error_private.h b/module/zstd/lib/common/error_private.h
index 9dcc85951..7bf4fd7dc 100644
--- a/module/zstd/lib/common/error_private.h
+++ b/module/zstd/lib/common/error_private.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/common/fse.h b/module/zstd/lib/common/fse.h
index b6c2a3e9c..ece4e4c53 100644
--- a/module/zstd/lib/common/fse.h
+++ b/module/zstd/lib/common/fse.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * FSE : Finite State Entropy codec
  * Public Prototypes declaration
diff --git a/module/zstd/lib/common/fse_decompress.c b/module/zstd/lib/common/fse_decompress.c
index c8f1bb0cf..d5378787d 100644
--- a/module/zstd/lib/common/fse_decompress.c
+++ b/module/zstd/lib/common/fse_decompress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * FSE : Finite State Entropy decoder
  * Copyright (c) Meta Platforms, Inc. and affiliates.
diff --git a/module/zstd/lib/common/huf.h b/module/zstd/lib/common/huf.h
index 4b142c4f9..c3dfd9c34 100644
--- a/module/zstd/lib/common/huf.h
+++ b/module/zstd/lib/common/huf.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * huff0 huffman codec,
  * part of Finite State Entropy library
diff --git a/module/zstd/lib/common/mem.h b/module/zstd/lib/common/mem.h
index e66a2eaeb..7f96e07fe 100644
--- a/module/zstd/lib/common/mem.h
+++ b/module/zstd/lib/common/mem.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/common/pool.c b/module/zstd/lib/common/pool.c
index 3adcefc9a..63dbdedb7 100644
--- a/module/zstd/lib/common/pool.c
+++ b/module/zstd/lib/common/pool.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/common/pool.h b/module/zstd/lib/common/pool.h
index f39b7f1eb..49bf19c6e 100644
--- a/module/zstd/lib/common/pool.h
+++ b/module/zstd/lib/common/pool.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/common/portability_macros.h b/module/zstd/lib/common/portability_macros.h
index 860734141..5aaa94b1d 100644
--- a/module/zstd/lib/common/portability_macros.h
+++ b/module/zstd/lib/common/portability_macros.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/common/xxhash.h b/module/zstd/lib/common/xxhash.h
index b6af402fd..5689762e9 100644
--- a/module/zstd/lib/common/xxhash.h
+++ b/module/zstd/lib/common/xxhash.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * xxHash - Extremely Fast Hash algorithm
  * Header File
diff --git a/module/zstd/lib/common/zstd_common.c b/module/zstd/lib/common/zstd_common.c
index 77cdfe15b..89791a11e 100644
--- a/module/zstd/lib/common/zstd_common.c
+++ b/module/zstd/lib/common/zstd_common.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/common/zstd_deps.h b/module/zstd/lib/common/zstd_deps.h
index 8a9c7cc53..a831ce1bf 100644
--- a/module/zstd/lib/common/zstd_deps.h
+++ b/module/zstd/lib/common/zstd_deps.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/common/zstd_internal.h b/module/zstd/lib/common/zstd_internal.h
index 2789a3591..341618c96 100644
--- a/module/zstd/lib/common/zstd_internal.h
+++ b/module/zstd/lib/common/zstd_internal.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/common/zstd_trace.h b/module/zstd/lib/common/zstd_trace.h
index d8eec1007..529795da6 100644
--- a/module/zstd/lib/common/zstd_trace.h
+++ b/module/zstd/lib/common/zstd_trace.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/clevels.h b/module/zstd/lib/compress/clevels.h
index c18da465f..d2bb81679 100644
--- a/module/zstd/lib/compress/clevels.h
+++ b/module/zstd/lib/compress/clevels.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/fse_compress.c b/module/zstd/lib/compress/fse_compress.c
index 1ce3cf16a..941d6aca0 100644
--- a/module/zstd/lib/compress/fse_compress.c
+++ b/module/zstd/lib/compress/fse_compress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * FSE : Finite State Entropy encoder
  * Copyright (c) Meta Platforms, Inc. and affiliates.
diff --git a/module/zstd/lib/compress/hist.c b/module/zstd/lib/compress/hist.c
index 4ccf9a90a..22bb7341e 100644
--- a/module/zstd/lib/compress/hist.c
+++ b/module/zstd/lib/compress/hist.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * hist : Histogram functions
  * part of Finite State Entropy project
diff --git a/module/zstd/lib/compress/hist.h b/module/zstd/lib/compress/hist.h
index bea2a9ebf..8496fcb5f 100644
--- a/module/zstd/lib/compress/hist.h
+++ b/module/zstd/lib/compress/hist.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * hist : Histogram functions
  * part of Finite State Entropy project
diff --git a/module/zstd/lib/compress/huf_compress.c b/module/zstd/lib/compress/huf_compress.c
index ea0007232..e5d0a9fa3 100644
--- a/module/zstd/lib/compress/huf_compress.c
+++ b/module/zstd/lib/compress/huf_compress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * Huffman encoder, part of New Generation Entropy library
  * Copyright (c) Meta Platforms, Inc. and affiliates.
diff --git a/module/zstd/lib/compress/zstd_compress.c b/module/zstd/lib/compress/zstd_compress.c
index d928b1d3e..c295804ed 100644
--- a/module/zstd/lib/compress/zstd_compress.c
+++ b/module/zstd/lib/compress/zstd_compress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_internal.h b/module/zstd/lib/compress/zstd_compress_internal.h
index ca5e2a4c5..bc92fe22e 100644
--- a/module/zstd/lib/compress/zstd_compress_internal.h
+++ b/module/zstd/lib/compress/zstd_compress_internal.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_literals.c b/module/zstd/lib/compress/zstd_compress_literals.c
index 06036de5d..c9ccf56b4 100644
--- a/module/zstd/lib/compress/zstd_compress_literals.c
+++ b/module/zstd/lib/compress/zstd_compress_literals.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_literals.h b/module/zstd/lib/compress/zstd_compress_literals.h
index b060c8ad2..5f6c515e1 100644
--- a/module/zstd/lib/compress/zstd_compress_literals.h
+++ b/module/zstd/lib/compress/zstd_compress_literals.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_sequences.c b/module/zstd/lib/compress/zstd_compress_sequences.c
index 7beb9daa6..1c4372145 100644
--- a/module/zstd/lib/compress/zstd_compress_sequences.c
+++ b/module/zstd/lib/compress/zstd_compress_sequences.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_sequences.h b/module/zstd/lib/compress/zstd_compress_sequences.h
index 4be8e91f2..d24a92cd4 100644
--- a/module/zstd/lib/compress/zstd_compress_sequences.h
+++ b/module/zstd/lib/compress/zstd_compress_sequences.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_superblock.c b/module/zstd/lib/compress/zstd_compress_superblock.c
index 6f57345be..750693a3c 100644
--- a/module/zstd/lib/compress/zstd_compress_superblock.c
+++ b/module/zstd/lib/compress/zstd_compress_superblock.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_compress_superblock.h b/module/zstd/lib/compress/zstd_compress_superblock.h
index 8e494f0d5..0998e0f14 100644
--- a/module/zstd/lib/compress/zstd_compress_superblock.h
+++ b/module/zstd/lib/compress/zstd_compress_superblock.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_cwksp.h b/module/zstd/lib/compress/zstd_cwksp.h
index 77518002d..0ea63b57b 100644
--- a/module/zstd/lib/compress/zstd_cwksp.h
+++ b/module/zstd/lib/compress/zstd_cwksp.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_double_fast.c b/module/zstd/lib/compress/zstd_double_fast.c
index 1a266e7d9..f5ab0627c 100644
--- a/module/zstd/lib/compress/zstd_double_fast.c
+++ b/module/zstd/lib/compress/zstd_double_fast.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_double_fast.h b/module/zstd/lib/compress/zstd_double_fast.h
index cd562fea8..7745799af 100644
--- a/module/zstd/lib/compress/zstd_double_fast.h
+++ b/module/zstd/lib/compress/zstd_double_fast.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_fast.c b/module/zstd/lib/compress/zstd_fast.c
index ee25bcbac..cd6236e15 100644
--- a/module/zstd/lib/compress/zstd_fast.c
+++ b/module/zstd/lib/compress/zstd_fast.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_fast.h b/module/zstd/lib/compress/zstd_fast.h
index 216821ac3..1c6f1dd72 100644
--- a/module/zstd/lib/compress/zstd_fast.h
+++ b/module/zstd/lib/compress/zstd_fast.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_lazy.c b/module/zstd/lib/compress/zstd_lazy.c
index 272ebe0ec..de206bc66 100644
--- a/module/zstd/lib/compress/zstd_lazy.c
+++ b/module/zstd/lib/compress/zstd_lazy.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_lazy.h b/module/zstd/lib/compress/zstd_lazy.h
index bd8dc49e6..74894b476 100644
--- a/module/zstd/lib/compress/zstd_lazy.h
+++ b/module/zstd/lib/compress/zstd_lazy.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_ldm.c b/module/zstd/lib/compress/zstd_ldm.c
index 070551cad..aa7c3ffce 100644
--- a/module/zstd/lib/compress/zstd_ldm.c
+++ b/module/zstd/lib/compress/zstd_ldm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_ldm.h b/module/zstd/lib/compress/zstd_ldm.h
index 42736231a..66c14db4c 100644
--- a/module/zstd/lib/compress/zstd_ldm.h
+++ b/module/zstd/lib/compress/zstd_ldm.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_ldm_geartab.h b/module/zstd/lib/compress/zstd_ldm_geartab.h
index ef34bc5c9..06b023c64 100644
--- a/module/zstd/lib/compress/zstd_ldm_geartab.h
+++ b/module/zstd/lib/compress/zstd_ldm_geartab.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_opt.c b/module/zstd/lib/compress/zstd_opt.c
index 3d7171b75..643b63aa4 100644
--- a/module/zstd/lib/compress/zstd_opt.c
+++ b/module/zstd/lib/compress/zstd_opt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_opt.h b/module/zstd/lib/compress/zstd_opt.h
index 756c7b1d0..97f1feed3 100644
--- a/module/zstd/lib/compress/zstd_opt.h
+++ b/module/zstd/lib/compress/zstd_opt.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_preSplit.c b/module/zstd/lib/compress/zstd_preSplit.c
index 67ab89f02..3caf01cde 100644
--- a/module/zstd/lib/compress/zstd_preSplit.c
+++ b/module/zstd/lib/compress/zstd_preSplit.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/compress/zstd_preSplit.h b/module/zstd/lib/compress/zstd_preSplit.h
index b89a200dc..43b92ab2a 100644
--- a/module/zstd/lib/compress/zstd_preSplit.h
+++ b/module/zstd/lib/compress/zstd_preSplit.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/decompress/huf_decompress.c b/module/zstd/lib/decompress/huf_decompress.c
index f85dd0bee..605b60c88 100644
--- a/module/zstd/lib/decompress/huf_decompress.c
+++ b/module/zstd/lib/decompress/huf_decompress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /* ******************************************************************
  * huff0 huffman decoder,
  * part of Finite State Entropy library
diff --git a/module/zstd/lib/decompress/huf_decompress_amd64.S b/module/zstd/lib/decompress/huf_decompress_amd64.S
index 656aada95..2e0e8c585 100644
--- a/module/zstd/lib/decompress/huf_decompress_amd64.S
+++ b/module/zstd/lib/decompress/huf_decompress_amd64.S
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/decompress/zstd_ddict.c b/module/zstd/lib/decompress/zstd_ddict.c
index 309ec0d03..d358c11d2 100644
--- a/module/zstd/lib/decompress/zstd_ddict.c
+++ b/module/zstd/lib/decompress/zstd_ddict.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/decompress/zstd_ddict.h b/module/zstd/lib/decompress/zstd_ddict.h
index c4ca8877a..a09cd6e90 100644
--- a/module/zstd/lib/decompress/zstd_ddict.h
+++ b/module/zstd/lib/decompress/zstd_ddict.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/decompress/zstd_decompress.c b/module/zstd/lib/decompress/zstd_decompress.c
index 9eb98327e..b021cf2d8 100644
--- a/module/zstd/lib/decompress/zstd_decompress.c
+++ b/module/zstd/lib/decompress/zstd_decompress.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/decompress/zstd_decompress_block.c b/module/zstd/lib/decompress/zstd_decompress_block.c
index 862785a49..ba2ae893e 100644
--- a/module/zstd/lib/decompress/zstd_decompress_block.c
+++ b/module/zstd/lib/decompress/zstd_decompress_block.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/decompress/zstd_decompress_block.h b/module/zstd/lib/decompress/zstd_decompress_block.h
index ab152404b..eef6e6fdd 100644
--- a/module/zstd/lib/decompress/zstd_decompress_block.h
+++ b/module/zstd/lib/decompress/zstd_decompress_block.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/decompress/zstd_decompress_internal.h b/module/zstd/lib/decompress/zstd_decompress_internal.h
index e4bffdbc6..8dcbae6c3 100644
--- a/module/zstd/lib/decompress/zstd_decompress_internal.h
+++ b/module/zstd/lib/decompress/zstd_decompress_internal.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/zstd.h b/module/zstd/lib/zstd.h
index b8c0644a7..ad164b7f6 100644
--- a/module/zstd/lib/zstd.h
+++ b/module/zstd/lib/zstd.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/lib/zstd_errors.h b/module/zstd/lib/zstd_errors.h
index 8ebc95cbb..b398857a7 100644
--- a/module/zstd/lib/zstd_errors.h
+++ b/module/zstd/lib/zstd_errors.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-only
 /*
  * Copyright (c) Meta Platforms, Inc. and affiliates.
  * All rights reserved.
diff --git a/module/zstd/zstd-in.c b/module/zstd/zstd-in.c
index f381ecc4f..815d25703 100644
--- a/module/zstd/zstd-in.c
+++ b/module/zstd/zstd-in.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 /**
  * \file zstd.c
  * Single-file Zstandard library.