--- a/src/internet-node/rtt-estimator.h	Wed Mar 12 16:05:31 2008 -0400
+++ b/src/internet-node/rtt-estimator.h	Wed Feb 20 14:26:42 2008 -0500
@@ -63,7 +63,7 @@
   virtual Time Estimate() = 0;
   virtual Time RetransmitTimeout() = 0;
   void Init(SequenceNumber s) { next = s;}
-  virtual RttEstimator* Copy() const = 0;
+  virtual Ptr<RttEstimator> Copy() const = 0;
   virtual void IncreaseMultiplier();
   virtual void ResetMultiplier();
   virtual void Reset();
@@ -116,7 +116,7 @@
   Time Estimate () { return est;}
   Time Variance () { return variance;}
   Time RetransmitTimeout ();
-  RttEstimator* Copy () const;
+  Ptr<RttEstimator> Copy () const;
   void Reset ();
   void Gain (double g) { gain = g;}