--- a/src/internet-stack/ipv4-l4-protocol.cc	Mon Oct 27 15:12:00 2008 -0400
+++ b/src/internet-stack/ipv4-l4-protocol.cc	Wed Oct 29 11:18:39 2008 -0700
@@ -44,4 +44,11 @@
 Ipv4L4Protocol::~Ipv4L4Protocol ()
 {}
 
+void 
+Ipv4L4Protocol::ReceiveIcmp (Ipv4Address icmpSource, uint8_t icmpTtl,
+                             uint8_t icmpType, uint8_t icmpCode, uint32_t icmpInfo,
+                             Ipv4Address payloadSource,Ipv4Address payloadDestination,
+                             const uint8_t payload[8])
+{}
+
 }//namespace ns3