diff --git a/model/ccnx-net-device-face.cc b/model/ccnx-net-device-face.cc
index d42515f..d4af70f 100644
--- a/model/ccnx-net-device-face.cc
+++ b/model/ccnx-net-device-face.cc
@@ -32,6 +32,16 @@
 
 namespace ns3 {
 
+TypeId
+CcnxNetDeviceFace::GetTypeId ()
+{
+  static TypeId tid = TypeId ("ns3::CcnxNetDeviceFace")
+    .SetParent<CcnxFace> ()
+    .SetGroupName ("Ccnx")
+    ;
+  return tid;
+}
+
 /** 
  * By default, Ccnx face are created in the "down" state.  Before
  * becoming useable, the user must invoke SetUp on the face