--- a/src/devices/wifi/mac-high-adhoc.cc	Fri Feb 22 23:28:01 2008 +0100
+++ b/src/devices/wifi/mac-high-adhoc.cc	Fri Feb 22 23:34:53 2008 +0100
@@ -49,7 +49,7 @@
   m_callback = callback;
 }
 void
-MacHighAdhoc::SetDcaTxop (DcaTxop *dca)
+MacHighAdhoc::SetDcaTxop (Ptr<DcaTxop> dca)
 {
   m_dca = dca;
 }