--- a/src/wifi/model/yans-wifi-channel.h	Sun Mar 13 16:03:33 2011 +0000
+++ b/src/wifi/model/yans-wifi-channel.h	Sun Mar 13 17:56:13 2011 +0000
@@ -84,6 +84,10 @@
              WifiMode wifiMode, WifiPreamble preamble) const;
 
 private:
+
+  YansWifiChannel& operator = (const YansWifiChannel &);
+  YansWifiChannel (const YansWifiChannel &);
+
   typedef std::vector<Ptr<YansWifiPhy> > PhyList;
   void Receive (uint32_t i, Ptr<Packet> packet, double rxPowerDbm,
                 WifiMode txMode, WifiPreamble preamble) const;