--- a/src/visualizer/model/visual-simulator-impl.cc	Sun Mar 29 16:43:22 2015 +0200
+++ b/src/visualizer/model/visual-simulator-impl.cc	Sun Mar 29 16:46:05 2015 +0200
@@ -45,6 +45,7 @@
 {
   static TypeId tid = TypeId ("ns3::VisualSimulatorImpl")
     .SetParent<SimulatorImpl> ()
+    .SetGroupName ("Visualizer")
     .AddConstructor<VisualSimulatorImpl> ()
     .AddAttribute ("SimulatorImplFactory",
                    "Factory for the underlying simulator implementation used by the visualizer.",