diff --git a/model/cs/ndn-content-store.cc b/model/cs/ndn-content-store.cc
index 90a5699..fbe85ce 100644
--- a/model/cs/ndn-content-store.cc
+++ b/model/cs/ndn-content-store.cc
@@ -60,8 +60,9 @@
 
 //////////////////////////////////////////////////////////////////////
 
-Entry::Entry (Ptr<const ContentObjectHeader> header, Ptr<const Packet> packet)
-  : m_header (header)
+Entry::Entry (Ptr<ContentStore> cs, Ptr<const ContentObjectHeader> header, Ptr<const Packet> packet)
+  : m_cs (cs)
+  , m_header (header)
   , m_packet (packet->Copy ())
 {
 }
@@ -95,6 +96,13 @@
   return m_packet;
 }
 
+Ptr<ContentStore>
+Entry::GetContentStore ()
+{
+  return m_cs;
+}
+
+
 } // namespace cs
 } // namespace ndn
 } // namespace ns3