diff --git a/model/ccnx-bestroute-strategy.h b/model/ccnx-bestroute-strategy.h
index f2d591b..6768da6 100644
--- a/model/ccnx-bestroute-strategy.h
+++ b/model/ccnx-bestroute-strategy.h
@@ -48,7 +48,7 @@
         
   // inherited from  CcnxForwardingStrategy
   virtual bool
-  PropagateInterest (const CcnxPitEntry  &pitEntry, 
+  PropagateInterest (Ptr<CcnxPitEntry> pitEntry, 
                      const Ptr<CcnxFace> &incomingFace,
                      Ptr<CcnxInterestHeader> &header,
                      const Ptr<const Packet> &packet);