diff --git a/samples/main-random-topology.cc b/samples/main-random-topology.cc
index 4c7e7b512..62e2d5fbb 100644
--- a/samples/main-random-topology.cc
+++ b/samples/main-random-topology.cc
@@ -32,7 +32,7 @@ int main (int argc, char *argv[])
   mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
   mobility.Install (c);
 
-  Config::Connect ("/NodeList/*/$ns3::MobilityModelNotifier/CourseChange",
+  Config::Connect ("/NodeList/*/$ns3::MobilityModel/CourseChange",
                               MakeCallback (&CourseChange));
   
   Simulator::Stop (Seconds (100.0));