--- a/src/csma/examples/csma-broadcast.cc	Mon Aug 13 10:46:09 2012 -0700
+++ b/src/csma/examples/csma-broadcast.cc	Mon Aug 13 16:08:13 2012 -0700
@@ -92,8 +92,8 @@
   NS_LOG_INFO ("Create Applications.");
   OnOffHelper onoff ("ns3::UdpSocketFactory", 
                      Address (InetSocketAddress (Ipv4Address ("255.255.255.255"), 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 app = onoff.Install (c0.Get (0));
   // Start the application