diff --git a/utils/trie/trie-with-policy.hpp b/utils/trie/trie-with-policy.hpp
index 2ab147d..f09f13b 100644
--- a/utils/trie/trie-with-policy.hpp
+++ b/utils/trie/trie-with-policy.hpp
@@ -21,7 +21,7 @@
 #ifndef TRIE_WITH_POLICY_H_
 #define TRIE_WITH_POLICY_H_
 
-#include "trie.h"
+#include "trie.hpp"
 
 namespace ns3 {
 namespace ndn {