--- a/src/point-to-point/model/point-to-point-channel.cc	Fri Mar 27 11:40:08 2015 -0700
+++ b/src/point-to-point/model/point-to-point-channel.cc	Fri Mar 27 11:52:25 2015 -0700
@@ -34,6 +34,7 @@
 {
   static TypeId tid = TypeId ("ns3::PointToPointChannel")
     .SetParent<Channel> ()
+    .SetGroupName ("PointToPoint")
     .AddConstructor<PointToPointChannel> ()
     .AddAttribute ("Delay", "Transmission delay through the channel",
                    TimeValue (Seconds (0)),

--- a/src/point-to-point/model/point-to-point-net-device.cc	Fri Mar 27 11:40:08 2015 -0700
+++ b/src/point-to-point/model/point-to-point-net-device.cc	Fri Mar 27 11:52:25 2015 -0700
@@ -40,6 +40,7 @@
 {
   static TypeId tid = TypeId ("ns3::PointToPointNetDevice")
     .SetParent<NetDevice> ()
+    .SetGroupName ("PointToPoint")
     .AddConstructor<PointToPointNetDevice> ()
     .AddAttribute ("Mtu", "The MAC-level Maximum Transmission Unit",
                    UintegerValue (DEFAULT_MTU),

--- a/src/point-to-point/model/point-to-point-remote-channel.cc	Fri Mar 27 11:40:08 2015 -0700
+++ b/src/point-to-point/model/point-to-point-remote-channel.cc	Fri Mar 27 11:52:25 2015 -0700
@@ -38,6 +38,7 @@
 {
   static TypeId tid = TypeId ("ns3::PointToPointRemoteChannel")
     .SetParent<PointToPointChannel> ()
+    .SetGroupName ("PointToPoint")
     .AddConstructor<PointToPointRemoteChannel> ()
   ;
   return tid;

--- a/src/point-to-point/model/ppp-header.cc	Fri Mar 27 11:40:08 2015 -0700
+++ b/src/point-to-point/model/ppp-header.cc	Fri Mar 27 11:52:25 2015 -0700
@@ -42,6 +42,7 @@
 {
   static TypeId tid = TypeId ("ns3::PppHeader")
     .SetParent<Header> ()
+    .SetGroupName ("PointToPoint")
     .AddConstructor<PppHeader> ()
   ;
   return tid;