--- a/examples/wireless/mixed-wireless.cc	Mon Aug 13 10:46:09 2012 -0700
+++ b/examples/wireless/mixed-wireless.cc	Mon Aug 13 16:08:13 2012 -0700
@@ -363,8 +363,8 @@
 
   OnOffHelper onoff ("ns3::UdpSocketFactory", 
                      Address (InetSocketAddress (remoteAddr, port)));
-  onoff.SetAttribute ("OnTime", RandomVariableValue (ConstantVariable (1)));
-  onoff.SetAttribute ("OffTime", RandomVariableValue (ConstantVariable (0)));
+  onoff.SetAttribute ("OnTime", StringValue ("ns3::ConstantRandomVariable[Constant=1]"));
+  onoff.SetAttribute ("OffTime", StringValue ("ns3::ConstantRandomVariable[Constant=0]"));
   ApplicationContainer apps = onoff.Install (appSource);
   apps.Start (Seconds (3.0));
   apps.Stop (Seconds (20.0));