diff --git a/lib/libc/gen/setmode.c b/lib/libc/gen/setmode.c
index c1f7efbb4fcd..9911634a7aa7 100644
--- a/lib/libc/gen/setmode.c
+++ b/lib/libc/gen/setmode.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: setmode.c,v 1.13 1996/04/03 19:49:01 jtc Exp $	*/
+/*	$NetBSD: setmode.c,v 1.14 1996/12/20 19:38:57 cgd Exp $	*/
 
 /*
  * Copyright (c) 1989, 1993, 1994
@@ -40,7 +40,7 @@
 #if 0
 static char sccsid[] = "@(#)setmode.c	8.2 (Berkeley) 3/25/94";
 #else
-static char rcsid[] = "$NetBSD: setmode.c,v 1.13 1996/04/03 19:49:01 jtc Exp $";
+static char rcsid[] = "$NetBSD: setmode.c,v 1.14 1996/12/20 19:38:57 cgd Exp $";
 #endif
 #endif /* LIBC_SCCS and not lint */
 
@@ -51,6 +51,7 @@ static char rcsid[] = "$NetBSD: setmode.c,v 1.13 1996/04/03 19:49:01 jtc Exp $";
 #include <errno.h>
 #include <signal.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 #ifdef SETMODE_DEBUG
 #include <stdio.h>
@@ -85,13 +86,13 @@ static void	 dumpmode __P((BITCMD *));
  */
 mode_t
 getmode(bbox, omode)
-	void *bbox;
+	const void *bbox;
 	mode_t omode;
 {
-	register BITCMD *set;
+	register const BITCMD *set;
 	register mode_t clrval, newmode, value;
 
-	set = (BITCMD *)bbox;
+	set = (const BITCMD *)bbox;
 	newmode = omode;
 	for (value = 0;; set++)
 		switch(set->cmd) {
@@ -170,7 +171,7 @@ common:			if (set->cmd2 & CMD2_CLR) {
 
 void *
 setmode(p)
-	register char *p;
+	register const char *p;
 {
 	register int perm, who;
 	register char op;