--- a/src/internet/model/ipv4-end-point.cc	Fri Feb 24 11:39:28 2012 +0000
+++ b/src/internet/model/ipv4-end-point.cc	Sun Feb 26 19:51:19 2012 +0100
@@ -40,6 +40,9 @@
     {
       m_destroyCallback ();
     }
+  m_rxCallback.Nullify ();
+  m_icmpCallback.Nullify ();
+  m_destroyCallback.Nullify ();
 }
 
 Ipv4Address