--- a/src/internet-stack/ipv4-l3-protocol.cc	Sun Apr 12 22:41:33 2009 -0700
+++ b/src/internet-stack/ipv4-l3-protocol.cc	Fri Apr 17 12:33:17 2009 -0700
@@ -150,7 +150,13 @@
 Ipv4L3Protocol::DoDispose (void)
 {
   NS_LOG_FUNCTION (this);
-  for (L4List_t::iterator i = m_protocols.begin(); i != m_protocols.end(); ++i)
+ 
+  for (SocketList::iterator i = m_sockets.begin (); i != m_sockets.end (); ++i)
+    {
+      *i = 0;
+    }
+
+ for (L4List_t::iterator i = m_protocols.begin(); i != m_protocols.end(); ++i)
     {
       *i = 0;
     }