--- src/sys/vfs/mfs/mfs_vnops.c	2007/05/06 19:23:34	1.34
+++ src/sys/vfs/mfs/mfs_vnops.c	2007/05/09 00:53:35	1.35
@@ -114,7 +114,7 @@ mfs_open(struct vop_open_args *ap)
 
 	if (vp->v_type != VCHR)
 		panic("mfs_open not VCHR");
-	v_associate_rdev(vp, udev2dev(vp->v_udev, 0));
+	v_associate_rdev(vp, get_dev(vp->v_umajor, vp->v_uminor));
 	return (vop_stdopen(ap));
 }