--- a/src/devices/point-to-point/point-to-point-net-device.cc	Thu Nov 06 15:04:25 2008 -0800
+++ b/src/devices/point-to-point/point-to-point-net-device.cc	Fri Nov 07 11:36:15 2008 -0800
@@ -378,6 +378,13 @@
   return Mac48Address ("01:00:5e:00:00:00");
 }
 
+Address
+PointToPointNetDevice::GetMulticast (Ipv6Address addr) const
+{
+  NS_LOG_FUNCTION(this << addr);
+  return Mac48Address ("33:33:00:00:00:00");
+}
+
   bool 
 PointToPointNetDevice::IsPointToPoint (void) const
 {