diff --git a/helper/tracers/ccnx-path-weight-tracer.h b/helper/tracers/ccnx-path-weight-tracer.h
index ca43a5d..868e61f 100644
--- a/helper/tracers/ccnx-path-weight-tracer.h
+++ b/helper/tracers/ccnx-path-weight-tracer.h
@@ -41,15 +41,15 @@
   void
   Connect ();
   
-  virtual void
-  PrintHeader (std::ostream &os) const;
+  static void
+  PrintHeader (std::ostream &os);
 
   /**
    * \brief Process packet weight upon reception of packet on a local face
    */
   virtual void
   InLocalFace (std::string context,
-               uint32_t weight, Ptr<Node> src, Ptr<Node> dst);
+               Ptr<Node> src, Ptr<Node> dst, uint32_t seqno, uint32_t weight);
 
 protected:
   std::ostream &m_os;