--- a/examples/realtime-udp-echo.cc	Thu Sep 04 13:29:13 2008 -0700
+++ b/examples/realtime-udp-echo.cc	Thu Sep 04 22:38:52 2008 -0700
@@ -73,7 +73,7 @@
   CsmaHelper csma;
   csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate(5000000)));
   csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
-  csma.SetDeviceAttribute ("MTU", UintegerValue (1400));
+  csma.SetDeviceAttribute ("Mtu", UintegerValue (1400));
   NetDeviceContainer d = csma.Install (n);
 
   //