diff --git a/sys/kern/subr_disk.c b/sys/kern/subr_disk.c
index 7d4918978164..50fd82ac3805 100644
--- a/sys/kern/subr_disk.c
+++ b/sys/kern/subr_disk.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: subr_disk.c,v 1.91 2008/01/31 18:30:55 dyoung Exp $	*/
+/*	$NetBSD: subr_disk.c,v 1.92 2008/02/28 04:55:47 matt Exp $	*/
 
 /*-
  * Copyright (c) 1996, 1997, 1999, 2000 The NetBSD Foundation, Inc.
@@ -74,7 +74,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: subr_disk.c,v 1.91 2008/01/31 18:30:55 dyoung Exp $");
+__KERNEL_RCSID(0, "$NetBSD: subr_disk.c,v 1.92 2008/02/28 04:55:47 matt Exp $");
 
 #include <sys/param.h>
 #include <sys/kernel.h>
@@ -185,7 +185,7 @@ disk_find(const char *name)
 }
 
 void
-disk_init(struct disk *diskp, const char *name, struct dkdriver *driver)
+disk_init(struct disk *diskp, const char *name, const struct dkdriver *driver)
 {
 
 	/*
diff --git a/sys/sys/disk.h b/sys/sys/disk.h
index ca82ae8846eb..a84a597de15f 100644
--- a/sys/sys/disk.h
+++ b/sys/sys/disk.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: disk.h,v 1.49 2008/02/11 22:40:14 dyoung Exp $	*/
+/*	$NetBSD: disk.h,v 1.50 2008/02/28 04:55:47 matt Exp $	*/
 
 /*-
  * Copyright (c) 1996, 1997, 2004 The NetBSD Foundation, Inc.
@@ -425,7 +425,7 @@ struct disk {
 	 */
 	struct io_stats	*dk_stats;
 
-	struct	dkdriver *dk_driver;	/* pointer to driver */
+	const struct dkdriver *dk_driver;	/* pointer to driver */
 
 	/*
 	 * Information required to be the parent of a disk wedge.
@@ -505,7 +505,7 @@ struct proc;
 
 void	disk_attach(struct disk *);
 void	disk_detach(struct disk *);
-void	disk_init(struct disk *, const char *, struct dkdriver *);
+void	disk_init(struct disk *, const char *, const struct dkdriver *);
 void	disk_destroy(struct disk *);
 void	disk_busy(struct disk *);
 void	disk_unbusy(struct disk *, long, int);