diff -r bb52e7eaaf33 -r e8634b0101f7 src/internet/model/ipv4-interface.cc
--- a/src/internet/model/ipv4-interface.cc	Mon Sep 14 13:34:07 2015 -0700
+++ b/src/internet/model/ipv4-interface.cc	Fri Sep 11 10:52:44 2015 +0200
@@ -41,6 +41,7 @@
 {
   static TypeId tid = TypeId ("ns3::Ipv4Interface")
     .SetParent<Object> ()
+    .SetGroupName ("Internet")
     .AddAttribute ("ArpCache",
                    "The arp cache for this ipv4 interface",
                    PointerValue (0),