--- a/src/wifi/model/arf-wifi-manager.cc	Fri Mar 27 10:03:43 2015 -0700
+++ b/src/wifi/model/arf-wifi-manager.cc	Fri Mar 27 11:28:59 2015 -0700
@@ -56,6 +56,7 @@
 {
   static TypeId tid = TypeId ("ns3::ArfWifiManager")
     .SetParent<WifiRemoteStationManager> ()
+    .SetGroupName ("Wifi")
     .AddConstructor<ArfWifiManager> ()
     .AddAttribute ("TimerThreshold", "The 'timer' threshold in the ARF algorithm.",
                    UintegerValue (15),