--- a/src/devices/wifi/dca-txop.h	Thu Feb 25 22:45:40 2010 +0300
+++ b/src/devices/wifi/dca-txop.h	Fri Feb 26 12:11:11 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);