===== net/ipv4/ipmr.c 1.46 vs edited =====
--- 1.46/net/ipv4/ipmr.c	2005-01-14 15:41:05 +11:00
+++ edited/net/ipv4/ipmr.c	2005-03-18 19:56:33 +11:00
@@ -1171,7 +1171,7 @@
 
 	dev = rt->u.dst.dev;
 
-	if (skb->len+encap > dst_pmtu(&rt->u.dst) && (ntohs(iph->frag_off) & IP_DF)) {
+	if (skb->len+encap > dst_mtu(&rt->u.dst) && (ntohs(iph->frag_off) & IP_DF)) {
 		/* Do not fragment multicasts. Alas, IPv4 does not
 		   allow to send ICMP, so that packets will disappear
 		   to blackhole.