diff --git a/model/ndn-l3-protocol.hpp b/model/ndn-l3-protocol.hpp
index a34d36f..cca0277 100644
--- a/model/ndn-l3-protocol.hpp
+++ b/model/ndn-l3-protocol.hpp
@@ -40,6 +40,9 @@
 namespace pit {
 class Entry;
 } // namespace pit
+namespace cs {
+class Policy;
+} // namespace cs
 } // namespace nfd
 
 namespace ns3 {
@@ -153,6 +156,14 @@
   void
   injectInterest(const Interest& interest);
 
+  typedef std::function<std::unique_ptr<nfd::cs::Policy>()> PolicyCreationCallback;
+
+  /**
+   * \brief Set the replacement policy of NFD's CS
+   */
+  void
+  setCsReplacementPolicy(const PolicyCreationCallback& policy);
+
 public: // Workaround for python bindings
   static Ptr<L3Protocol>
   getL3Protocol(Ptr<Object> node);