diff --git a/include/ndnboost/mpl/at_fwd.hpp b/include/ndnboost/mpl/at_fwd.hpp
index d391547..4a802e2 100644
--- a/include/ndnboost/mpl/at_fwd.hpp
+++ b/include/ndnboost/mpl/at_fwd.hpp
@@ -1,6 +1,6 @@
 
-#ifndef BOOST_MPL_AT_FWD_HPP_INCLUDED
-#define BOOST_MPL_AT_FWD_HPP_INCLUDED
+#ifndef NDNBOOST_MPL_AT_FWD_HPP_INCLUDED
+#define NDNBOOST_MPL_AT_FWD_HPP_INCLUDED
 
 // Copyright Aleksey Gurtovoy 2000-2004
 //
@@ -21,4 +21,4 @@
 
 }}
 
-#endif // BOOST_MPL_AT_FWD_HPP_INCLUDED
+#endif // NDNBOOST_MPL_AT_FWD_HPP_INCLUDED