diff --git a/model/cs/ndn-content-store.hpp b/model/cs/ndn-content-store.hpp
index e28eea0..e007b32 100644
--- a/model/cs/ndn-content-store.hpp
+++ b/model/cs/ndn-content-store.hpp
@@ -36,9 +36,6 @@
 
 namespace ndn {
 
-class Data;
-class Interest;
-class Name;
 class ContentStore;
 
 /**
@@ -90,7 +87,7 @@
   GetContentStore();
 
 private:
-  Ptr<ContentStore> m_cs; ///< \brief content store to which entry is added
+  Ptr<ContentStore> m_cs;        ///< \brief content store to which entry is added
   shared_ptr<const Data> m_data; ///< \brief non-modifiable Data
 };
 
@@ -211,4 +208,14 @@
 } // namespace ndn
 } // namespace ns3
 
+#include <boost/functional/hash.hpp>
+namespace boost {
+inline std::size_t
+hash_value(const ::ndn::name::Component component)
+{
+  return boost::hash_range(component.wireEncode().wire(),
+                           component.wireEncode().wire() + component.wireEncode().size());
+}
+}
+
 #endif // NDN_CONTENT_STORE_H