Is this a typo in if_tap.c?

When I was trying to create a second tap device, kernel crashed.
Is this patch correct ?


Index: sys/net/if_tap.c
===================================================================
--- sys/net/if_tap.c	(revision 243397)
+++ sys/net/if_tap.c	(working copy)
_at__at_ -186,7 +186,7 _at__at_
  	/* Find any existing device, or allocate new unit number. */
  	i = clone_create(&tapclones, &tap_cdevsw, &unit, &dev, 0);
  	if (i) {
-		dev = make_dev(&tap_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
+		dev = make_dev(&tap_cdevsw, unit, UID_ROOT, GID_WHEEL, 0600,
  		    "%s%d", tapname, unit);
  	}