--- a/src/devices/csma/csma-net-device.h	Fri Jul 04 18:48:10 2008 +0100
+++ b/src/devices/csma/csma-net-device.h	Fri Jul 04 19:15:00 2008 +0100
@@ -286,6 +286,7 @@
    */
   virtual void SetReceiveCallback (NetDevice::ReceiveCallback cb);
   virtual void SetPromiscuousReceiveCallback (PromiscuousReceiveCallback cb);
+  virtual bool SupportsPromiscuousReceiveCallback (void) const;
 
 protected:
   /**