diff --git a/utils/tracers/ndn-cs-tracer.h b/utils/tracers/ndn-cs-tracer.h
index af7419a..b52de9c 100644
--- a/utils/tracers/ndn-cs-tracer.h
+++ b/utils/tracers/ndn-cs-tracer.h
@@ -117,12 +117,10 @@
   Connect ();
 
   void 
-  CacheHits (std::string context,
-  Ptr<const InterestHeader>, Ptr<const ContentObjectHeader>);
+  CacheHits (Ptr<const InterestHeader>, Ptr<const ContentObjectHeader>);
   
   void 
-  CacheMisses (std::string context,
-  Ptr<const InterestHeader>);
+  CacheMisses (Ptr<const InterestHeader>);
 
 private:
   void