diff --git a/model/ndn-interest-header.cc b/model/ndn-interest-header.cc
index bb6c329..240bc48 100644
--- a/model/ndn-interest-header.cc
+++ b/model/ndn-interest-header.cc
@@ -50,8 +50,10 @@
   
 
 InterestHeader::InterestHeader ()
-  : m_minSuffixComponents (-1)
+  : m_name ()
+  , m_minSuffixComponents (-1)
   , m_maxSuffixComponents (-1)
+  , m_exclude ()
   , m_childSelector (false)
   , m_answerOriginKind (false)
   , m_scope (-1)
@@ -61,6 +63,20 @@
 {
 }
 
+InterestHeader::InterestHeader (const InterestHeader &interest)
+  : m_name                (Create<NameComponents> (interest.GetName ()))
+  , m_minSuffixComponents (interest.m_minSuffixComponents)
+  , m_maxSuffixComponents (interest.m_maxSuffixComponents)
+  , m_exclude             (Create<NameComponents> (interest.GetExclude ()))
+  , m_childSelector       (interest.m_childSelector)
+  , m_answerOriginKind    (interest.m_answerOriginKind)
+  , m_scope               (interest.m_scope)
+  , m_interestLifetime    (interest.m_interestLifetime)
+  , m_nonce               (interest.m_nonce)
+  , m_nackType            (interest.m_nackType)
+{
+}
+
 void
 InterestHeader::SetName (const Ptr<NameComponents> &name)
 {