--- a/src/devices/point-to-point/point-to-point-net-device.cc	Tue Aug 28 14:32:44 2007 +0200
+++ b/src/devices/point-to-point/point-to-point-net-device.cc	Tue Aug 28 14:33:53 2007 +0200
@@ -195,7 +195,7 @@
 }
 
 Ptr<TraceResolver> 
-PointToPointNetDevice::GetTraceResolver (void)
+PointToPointNetDevice::GetTraceResolver (void) const
 {
   Ptr<CompositeTraceResolver> resolver = Create<CompositeTraceResolver> ();
   resolver->AddChild ("queue", m_queue);