diff -u sys/kern/kern_conf.c sys/kern/kern_conf.c
--- sys/kern/kern_conf.c	(working copy)
+++ sys/kern/kern_conf.c	(working copy)
@@ -726,7 +726,6 @@
 	dev = newdev(devsw, unit, dev_new);
 	res = prep_devname(dev, fmt, ap);
 	if (res != 0) {
-#ifdef notyet
 		if ((flags & MAKEDEV_CHECKNAME) == 0) {
 			panic(
 			"make_dev_credv: bad si_name (error=%d, si_name=%s)",
@@ -738,11 +737,6 @@
 			devfs_free(dev);
 		}
 		return (res);
-#else
-		printf(
-	"make_dev_credv: prep_devname() failed (error=%d, si_name=%s)\n",
-			    res, dev->si_name);
-#endif
 	}
 	if (flags & MAKEDEV_REF)
 		dev_refl(dev);