diff --git a/include/stdio.h b/include/stdio.h
index bf014293530..348db22e181 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -200,12 +200,6 @@ __END_DECLS
 #ifndef SEEK_END
 #define	SEEK_END	2	/* set file offset to EOF plus offset */
 #endif
-#ifndef SEEK_DATA
-#define	SEEK_DATA	3	/* set file offset to next data past offset */
-#endif
-#ifndef SEEK_HOLE
-#define	SEEK_HOLE	4	/* set file offset to next hole past offset */
-#endif
 
 #define	stdin	__stdinp
 #define	stdout	__stdoutp
diff --git a/sys/sys/unistd.h b/sys/sys/unistd.h
index 9f3eac920fb..752e135789c 100644
--- a/sys/sys/unistd.h
+++ b/sys/sys/unistd.h
@@ -107,6 +107,8 @@
 #define	SEEK_SET	0	/* set file offset to offset */
 #define	SEEK_CUR	1	/* set file offset to current plus offset */
 #define	SEEK_END	2	/* set file offset to EOF plus offset */
+#endif
+#if !defined(_POSIX_SOURCE) && !defined(_XOPEN_SOURCE)
 #define	SEEK_DATA	3	/* set file offset to next data past offset */
 #define	SEEK_HOLE	4	/* set file offset to next hole past offset */
 #endif