--- a/src/devices/wifi/propagation-delay-model.h	Thu Apr 10 10:23:56 2008 -0700
+++ b/src/devices/wifi/propagation-delay-model.h	Thu Apr 10 10:24:18 2008 -0700
@@ -35,6 +35,7 @@
 class PropagationDelayModel : public Object
 {
 public:
+  static TypeId GetTypeId (void);
   virtual ~PropagationDelayModel ();
   /**
    * \param a the source