diff --git a/include/ndnboost/mpl/prior.hpp b/include/ndnboost/mpl/prior.hpp
index a7ae4e7..9e880ea 100644
--- a/include/ndnboost/mpl/prior.hpp
+++ b/include/ndnboost/mpl/prior.hpp
@@ -1,6 +1,6 @@
 
-#ifndef BOOST_MPL_PRIOR_HPP_INCLUDED
-#define BOOST_MPL_PRIOR_HPP_INCLUDED
+#ifndef NDNBOOST_MPL_PRIOR_HPP_INCLUDED
+#define NDNBOOST_MPL_PRIOR_HPP_INCLUDED
 
 // Copyright Aleksey Gurtovoy 2004
 //
@@ -16,4 +16,4 @@
 
 #include <ndnboost/mpl/next_prior.hpp>
 
-#endif // BOOST_MPL_PRIOR_HPP_INCLUDED
+#endif // NDNBOOST_MPL_PRIOR_HPP_INCLUDED