diff --git a/include/ndnboost/unordered/detail/fwd.hpp b/include/ndnboost/unordered/detail/fwd.hpp
index 929466f..c4f4cda 100644
--- a/include/ndnboost/unordered/detail/fwd.hpp
+++ b/include/ndnboost/unordered/detail/fwd.hpp
@@ -3,8 +3,8 @@
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
-#ifndef BOOST_UNORDERED_FWD_HPP_INCLUDED
-#define BOOST_UNORDERED_FWD_HPP_INCLUDED
+#ifndef NDNBOOST_UNORDERED_FWD_HPP_INCLUDED
+#define NDNBOOST_UNORDERED_FWD_HPP_INCLUDED
 
 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
 # pragma once