diff --git a/lib/libc/gen/getpagesize.c b/lib/libc/gen/getpagesize.c
index bea86cd3f866..6616f89d7fd9 100644
--- a/lib/libc/gen/getpagesize.c
+++ b/lib/libc/gen/getpagesize.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: getpagesize.c,v 1.5 1995/02/25 08:51:21 cgd Exp $	*/
+/*	$NetBSD: getpagesize.c,v 1.6 1997/07/13 19:12:30 christos Exp $	*/
 
 /*
  * Copyright (c) 1989, 1993
@@ -33,16 +33,18 @@
  * SUCH DAMAGE.
  */
 
+#include <sys/cdefs.h>
 #if defined(LIBC_SCCS) && !defined(lint)
 #if 0
 static char sccsid[] = "@(#)getpagesize.c	8.1 (Berkeley) 6/4/93";
 #else
-static char rcsid[] = "$NetBSD: getpagesize.c,v 1.5 1995/02/25 08:51:21 cgd Exp $";
+__RCSID("$NetBSD: getpagesize.c,v 1.6 1997/07/13 19:12:30 christos Exp $");
 #endif
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/param.h>
 #include <sys/sysctl.h>
+#include <unistd.h>
 
 int
 getpagesize()