--- a/src/devices/wifi/dca-txop.h	Fri Jan 08 18:04:01 2010 +0100
+++ b/src/devices/wifi/dca-txop.h	Mon Jan 11 12:23:09 2010 +0300
@@ -121,7 +121,7 @@
 
   // Inherited from ns3::Object
   Ptr<MacLow> Low (void);
-
+  void DoStart ();
   /* dcf notifications forwarded here */
   bool NeedsAccess (void) const;
   void NotifyAccessGranted (void);