--- linux-2.4.18.SuSE/net/8021q/vlan.c.orig	Wed Mar 27 13:57:17 2002
+++ linux-2.4.18.SuSE/net/8021q/vlan.c	Wed Sep 18 13:19:13 2002
@@ -207,7 +207,7 @@
 #endif
 
 	/* sanity check */
-	if ((vlan_id >= VLAN_VID_MASK) || (vlan_id <= 0))
+	if ((vlan_id >= VLAN_VID_MASK) || (vlan_id < 0))
 		return -EINVAL;
 
 	spin_lock_bh(&vlan_group_lock);