diff --git a/model/ccnx-net-device-face.cc b/model/ccnx-net-device-face.cc
index 8304711..a903da7 100644
--- a/model/ccnx-net-device-face.cc
+++ b/model/ccnx-net-device-face.cc
@@ -78,6 +78,7 @@
 void
 CcnxNetDeviceFace::RegisterProtocolHandler (ProtocolHandler handler)
 {
+  NS_LOG_FUNCTION(this);
   NS_ASSERT_MSG (m_netDevice != 0, "CcnxNetDeviceFace needs to be assigned NetDevice first");
   
   m_protocolHandler = handler;