diff --git a/src/lib/libutil/opendev.3 b/src/lib/libutil/opendev.3
index f6266b01..08b06138 100644
--- a/src/lib/libutil/opendev.3
+++ b/src/lib/libutil/opendev.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: opendev.3,v 1.18 2010/04/01 17:06:55 jmc Exp $
+.\"	$OpenBSD: opendev.3,v 1.19 2010/12/17 19:35:34 millert Exp $
 .\"
 .\" Copyright (c) 2000, Todd C. Miller.  All rights reserved.
 .\" Copyright (c) 1996, Jason Downs.  All rights reserved.
@@ -24,7 +24,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: April 1 2010 $
+.Dd $Mdocdate: December 17 2010 $
 .Dt OPENDEV 3
 .Os
 .Sh NAME
@@ -33,7 +33,7 @@
 .Sh SYNOPSIS
 .Fd #include <util.h>
 .Ft int
-.Fn opendev "char *path" "int oflags" "int dflags" "char **realpath"
+.Fn opendev "const char *path" "int oflags" "int dflags" "char **realpath"
 .Sh DESCRIPTION
 The
 .Fn opendev
diff --git a/src/lib/libutil/opendev.c b/src/lib/libutil/opendev.c
index 5856cbd2..b43cb819 100644
--- a/src/lib/libutil/opendev.c
+++ b/src/lib/libutil/opendev.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: opendev.c,v 1.11 2010/11/15 15:07:40 jsing Exp $	*/
+/*	$OpenBSD: opendev.c,v 1.12 2010/12/17 19:35:34 millert Exp $	*/
 
 /*
  * Copyright (c) 2000, Todd C. Miller.  All rights reserved.
@@ -46,7 +46,7 @@
  * disklabel(8).
  */
 int
-opendev(char *path, int oflags, int dflags, char **realpath)
+opendev(const char *path, int oflags, int dflags, char **realpath)
 {
 	static char namebuf[PATH_MAX];
 	struct dk_diskmap dm;
@@ -55,7 +55,7 @@ opendev(char *path, int oflags, int dflags, char **realpath)
 
 	/* Initial state */
 	if (realpath)
-		*realpath = path;
+		*realpath = (char *)path;
 	fd = -1;
 	errno = ENOENT;
 
diff --git a/src/lib/libutil/util.h b/src/lib/libutil/util.h
index c0b5bb68..35bc6be9 100644
--- a/src/lib/libutil/util.h
+++ b/src/lib/libutil/util.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: util.h,v 1.28 2010/11/15 15:07:40 jsing Exp $	*/
+/*	$OpenBSD: util.h,v 1.29 2010/12/17 19:35:34 millert Exp $	*/
 /*	$NetBSD: util.h,v 1.2 1996/05/16 07:00:22 thorpej Exp $	*/
 
 /*-
@@ -86,7 +86,7 @@ void	login(struct utmp *);
 int	login_tty(int);
 int	logout(const char *);
 void	logwtmp(const char *, const char *, const char *);
-int	opendev(char *, int, int, char **);
+int	opendev(const char *, int, int, char **);
 int	pidfile(const char *);
 void	pw_setdir(const char *);
 char   *pw_file(const char *);