diff --git a/model/ndn-interest-header.cc b/model/ndn-interest-header.cc
index 240bc48..46cbf25 100644
--- a/model/ndn-interest-header.cc
+++ b/model/ndn-interest-header.cc
@@ -78,7 +78,7 @@
 }
 
 void
-InterestHeader::SetName (const Ptr<NameComponents> &name)
+InterestHeader::SetName (Ptr<NameComponents> name)
 {
   m_name = name;
 }
@@ -121,7 +121,7 @@
 }
 
 void
-InterestHeader::SetExclude (const Ptr<NameComponents> &exclude)
+InterestHeader::SetExclude (Ptr<NameComponents> exclude)
 {
   m_exclude = exclude;
 }