--- linux-2.6.1.orig/net/ipv6/sit.c	2004-01-09 08:00:03.000000000 +0100
+++ linux-2.6.1/net/ipv6/sit.c	2004-01-16 09:51:13.000000000 +0100
@@ -485,7 +485,8 @@ static int ipip6_tunnel_xmit(struct sk_b
 					      { .daddr = dst,
 						.saddr = tiph->saddr,
 						.tos = RT_TOS(tos) } },
-				    .oif = tunnel->parms.link };
+				    .oif = tunnel->parms.link,
+				    .proto = IPPROTO_IPV6 };
 		if (ip_route_output_key(&rt, &fl)) {
 			tunnel->stat.tx_carrier_errors++;
 			goto tx_error_icmp;
@@ -757,7 +758,8 @@ static int ipip6_tunnel_init(struct net_
 					      { .daddr = iph->daddr,
 						.saddr = iph->saddr,
 						.tos = RT_TOS(iph->tos) } },
-				    .oif = tunnel->parms.link };
+				    .oif = tunnel->parms.link,
+				    .proto = IPPROTO_IPV6 };
 		struct rtable *rt;
 		if (!ip_route_output_key(&rt, &fl)) {
 			tdev = rt->u.dst.dev;