diff --git a/include/ndnboost/mpl/equal_to.hpp b/include/ndnboost/mpl/equal_to.hpp
index bd01f0c..1fa0ae7 100644
--- a/include/ndnboost/mpl/equal_to.hpp
+++ b/include/ndnboost/mpl/equal_to.hpp
@@ -1,6 +1,6 @@
 
-#ifndef BOOST_MPL_EQUAL_TO_HPP_INCLUDED
-#define BOOST_MPL_EQUAL_TO_HPP_INCLUDED
+#ifndef NDNBOOST_MPL_EQUAL_TO_HPP_INCLUDED
+#define NDNBOOST_MPL_EQUAL_TO_HPP_INCLUDED
 
 // Copyright Aleksey Gurtovoy 2000-2004
 //
@@ -18,4 +18,4 @@
 #define AUX778076_OP_TOKEN ==
 #include <ndnboost/mpl/aux_/comparison_op.hpp>
 
-#endif // BOOST_MPL_EQUAL_TO_HPP_INCLUDED
+#endif // NDNBOOST_MPL_EQUAL_TO_HPP_INCLUDED