--- src/sys/netinet/ip_icmp.c	2005/01/06 09:14:13	1.18
+++ src/sys/netinet/ip_icmp.c	2005/01/06 17:59:32	1.19
@@ -422,8 +422,7 @@ icmp_input(struct mbuf *m, ...)
 			struct rtentry *rt;
 			int mtu;
 
-			rt = rtlookup((struct sockaddr *)&icmpsrc, 0,
-				      RTF_CLONING | RTF_PRCLONING);
+			rt = rtpurelookup((struct sockaddr *)&icmpsrc);
 			if (rt != NULL && (rt->rt_flags & RTF_HOST) &&
 			    !(rt->rt_rmx.rmx_locks & RTV_MTU)) {
 				mtu = ntohs(icp->icmp_nextmtu);