diff --git a/utils/trie/trie-with-policy.hpp b/utils/trie/trie-with-policy.hpp
index 2ef3bc4..d0d54f6 100644
--- a/utils/trie/trie-with-policy.hpp
+++ b/utils/trie/trie-with-policy.hpp
@@ -20,6 +20,8 @@
 #ifndef TRIE_WITH_POLICY_H_
 #define TRIE_WITH_POLICY_H_
 
+/// @cond include_hidden
+
 #include "trie.hpp"
 
 namespace ns3 {
@@ -299,4 +301,6 @@
 } // ndn
 } // ns3
 
+/// @endcond
+
 #endif // TRIE_WITH_POLICY_H_