diff --git a/include/ndnboost/mpl/list/aux_/O1_size.hpp b/include/ndnboost/mpl/list/aux_/O1_size.hpp
index f5fda21..801a404 100644
--- a/include/ndnboost/mpl/list/aux_/O1_size.hpp
+++ b/include/ndnboost/mpl/list/aux_/O1_size.hpp
@@ -1,6 +1,6 @@
 
-#ifndef BOOST_MPL_LIST_AUX_O1_SIZE_HPP_INCLUDED
-#define BOOST_MPL_LIST_AUX_O1_SIZE_HPP_INCLUDED
+#ifndef NDNBOOST_MPL_LIST_AUX_O1_SIZE_HPP_INCLUDED
+#define NDNBOOST_MPL_LIST_AUX_O1_SIZE_HPP_INCLUDED
 
 // Copyright Aleksey Gurtovoy 2000-2004
 //
@@ -30,4 +30,4 @@
 
 }}
 
-#endif // BOOST_MPL_LIST_AUX_O1_SIZE_HPP_INCLUDED
+#endif // NDNBOOST_MPL_LIST_AUX_O1_SIZE_HPP_INCLUDED