--- a/src/internet-node/udp-socket-impl.cc	Tue May 27 22:30:11 2008 -0700
+++ b/src/internet-node/udp-socket-impl.cc	Wed May 28 17:52:42 2008 +0100
@@ -133,8 +133,8 @@
     {
       return -1;
     }
-  m_endPoint->SetRxCallback (MakeCallback (&UdpSocketImpl::ForwardUp, this));
-  m_endPoint->SetDestroyCallback (MakeCallback (&UdpSocketImpl::Destroy, this));
+  m_endPoint->SetRxCallback (MakeCallback (&UdpSocketImpl::ForwardUp, Ptr<UdpSocketImpl> (this)));
+  m_endPoint->SetDestroyCallback (MakeCallback (&UdpSocketImpl::Destroy, Ptr<UdpSocketImpl> (this)));
   return 0;
 }