diff --git a/include/unistd.h b/include/unistd.h
index e0a3db4c028d..e893da7d4dc7 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -143,8 +143,7 @@ typedef	__uid_t_	uid_t;
 #define	_XOPEN_UNIX			-1
 #endif
 
-/* Define the versions we target for compliance. */
-#define	_POSIX_VERSION		200112L
+/* Define the POSIX.2 version we target for compliance. */
 #define	_POSIX2_VERSION		199212L
 
 /*
diff --git a/sys/sys/unistd.h b/sys/sys/unistd.h
index 238f1208b3eb..0758b3514f15 100644
--- a/sys/sys/unistd.h
+++ b/sys/sys/unistd.h
@@ -95,6 +95,9 @@
 #define	_POSIX_SAVED_IDS	1 /* saved set-user-ID and set-group-ID */
 #endif
 
+/* Define the POSIX.1 version we target for compliance. */
+#define	_POSIX_VERSION		200112L
+
 /* access function */
 #define	F_OK		0	/* test for existence of file */
 #define	X_OK		0x01	/* test for execute or search permission */