--- a/src/internet-node/arp-l3-protocol.cc	Tue Jul 31 09:17:05 2007 +0200
+++ b/src/internet-node/arp-l3-protocol.cc	Tue Jul 31 09:21:40 2007 +0200
@@ -39,7 +39,9 @@
 
 ArpL3Protocol::ArpL3Protocol (Ptr<Node> node)
   : m_node (node)
-{}
+{
+  SetInterfaceId (ArpL3Protocol::iid);
+}
 
 ArpL3Protocol::~ArpL3Protocol ()
 {}

--- a/src/internet-node/ipv4-l3-protocol.cc	Tue Jul 31 09:17:05 2007 +0200
+++ b/src/internet-node/ipv4-l3-protocol.cc	Tue Jul 31 09:21:40 2007 +0200
@@ -50,6 +50,7 @@
     m_identification (0),
     m_node (node)
 {
+  SetInterfaceId (Ipv4L3Protocol::iid);
   m_staticRouting = Create<Ipv4StaticRouting> ();
   AddRoutingProtocol (m_staticRouting, 0);
   SetupLoopback ();