diff --git a/contrib/diff/sdiff.c b/contrib/diff/sdiff.c
index 5b5759ededcd..08673d89b39b 100644
--- a/contrib/diff/sdiff.c
+++ b/contrib/diff/sdiff.c
@@ -19,8 +19,10 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
 /* GNU SDIFF was written by Thomas Lord. */
 
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
+#ifndef lint
+static const char rcsid[] =
+"$FreeBSD$";
+#endif
 
 #include "system.h"
 #include <stdio.h>