--- linux-2.6.orig/drivers/net/wan/hdlc_cisco.c	2003-08-09 06:34:37.000000000 +0200
+++ linux-2.6/drivers/net/wan/hdlc_cisco.c	2003-10-09 23:40:00.000000000 +0200
@@ -311,7 +311,9 @@
 		hdlc->proto.id = IF_PROTO_CISCO;
 		dev->hard_start_xmit = hdlc->xmit;
 		dev->hard_header = cisco_hard_header;
+		dev->hard_header_cache = NULL;
 		dev->type = ARPHRD_CISCO;
+		dev->flags = IFF_POINTOPOINT | IFF_NOARP;
 		dev->addr_len = 0;
 		return 0;
 	}