diff --git a/module/icp/asm-x86_64/aes/aes_aesni.S b/module/icp/asm-x86_64/aes/aes_aesni.S
index 4f3fe3ec6..b8ab93794 100644
--- a/module/icp/asm-x86_64/aes/aes_aesni.S
+++ b/module/icp/asm-x86_64/aes/aes_aesni.S
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: OpenSSL-standalone
 /*
  * ====================================================================
  * Written by Intel Corporation for the OpenSSL project to add support