diff --git a/include/sys/zfs_context.h b/include/sys/zfs_context.h
index e7d164a17..64aee9dc3 100644
--- a/include/sys/zfs_context.h
+++ b/include/sys/zfs_context.h
@@ -124,6 +124,7 @@ extern "C" {
 #include <sys/cmn_err.h>
 #include <sys/thread.h>
 #include <sys/taskq.h>
+#include <sys/tsd.h>
 #include <sys/zfs_delay.h>
 
 #include <sys/zfs_context_os.h>
@@ -177,13 +178,6 @@ extern "C" {
 #endif	/* DTRACE_PROBE4 */
 #define	DTRACE_PROBE4(a, b, c, d, e, f, g, h, i)
 
-/*
- * Thread-specific data
- */
-#define	tsd_get(k) pthread_getspecific(k)
-#define	tsd_set(k, v) pthread_setspecific(k, v)
-#define	tsd_create(kp, d) pthread_key_create((pthread_key_t *)kp, d)
-#define	tsd_destroy(kp) /* nothing */
 #ifdef __FreeBSD__
 typedef off_t loff_t;
 #endif
diff --git a/lib/libspl/include/Makefile.am b/lib/libspl/include/Makefile.am
index 7d5e1b7b3..c5e6111fa 100644
--- a/lib/libspl/include/Makefile.am
+++ b/lib/libspl/include/Makefile.am
@@ -62,6 +62,7 @@ libspl_sys_HEADERS = \
 	%D%/sys/time.h \
 	%D%/sys/timer.h \
 	%D%/sys/trace_spl.h \
+	%D%/sys/tsd.h \
 	%D%/sys/tunables.h \
 	%D%/sys/types.h \
 	%D%/sys/types32.h \
diff --git a/lib/libspl/include/sys/tsd.h b/lib/libspl/include/sys/tsd.h
new file mode 100644
index 000000000..fa91519b3
--- /dev/null
+++ b/lib/libspl/include/sys/tsd.h
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: CDDL-1.0
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or https://opensource.org/licenses/CDDL-1.0.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+ * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
+ * Copyright (c) 2012, Joyent, Inc. All rights reserved.
+ */
+
+#ifndef _SYS_TSD_H
+#define	_SYS_TSD_H
+
+#include <pthread.h>
+
+/*
+ * Thread-specific data
+ */
+#define	tsd_get(k)		pthread_getspecific(k)
+#define	tsd_set(k, v)		pthread_setspecific(k, v)
+#define	tsd_create(kp, d)	pthread_key_create((pthread_key_t *)kp, d)
+#define	tsd_destroy(kp)		/* nothing */
+
+#endif /* _SYS_MUTEX_H */
diff --git a/lib/libzpool/kernel.c b/lib/libzpool/kernel.c
index 019f4e573..aed0a96bb 100644
--- a/lib/libzpool/kernel.c
+++ b/lib/libzpool/kernel.c
@@ -43,6 +43,7 @@
 #include <sys/stat.h>
 #include <sys/systeminfo.h>
 #include <sys/time.h>
+#include <sys/tsd.h>
 #include <sys/utsname.h>
 #include <sys/zfs_context.h>
 #include <sys/zfs_onexit.h>