diff --git a/model/ccnx-net-device-face.h b/model/ccnx-net-device-face.h
index 482d5d3..148da39 100644
--- a/model/ccnx-net-device-face.h
+++ b/model/ccnx-net-device-face.h
@@ -45,6 +45,9 @@
 class CcnxNetDeviceFace  : public CcnxFace
 {
 public:
+  static TypeId
+  GetTypeId ();
+
   /**
    * \brief Constructor
    *