diff --git a/include/boost/detail/is_incrementable.hpp b/include/boost/detail/is_incrementable.hpp
index 0ae4eca..cb7d7a7 100755
--- a/include/boost/detail/is_incrementable.hpp
+++ b/include/boost/detail/is_incrementable.hpp
@@ -4,13 +4,15 @@
 #ifndef IS_INCREMENTABLE_DWA200415_HPP
 # define IS_INCREMENTABLE_DWA200415_HPP
 
-# include <boost/type_traits/detail/bool_trait_def.hpp>
 # include <boost/type_traits/detail/template_arity_spec.hpp>
 # include <boost/type_traits/remove_cv.hpp>
 # include <boost/mpl/aux_/lambda_support.hpp>
 # include <boost/mpl/bool.hpp>
 # include <boost/detail/workaround.hpp>
 
+// Must be the last include
+# include <boost/type_traits/detail/bool_trait_def.hpp>
+
 namespace boost { namespace detail { 
 
 // is_incrementable<T> metafunction
@@ -117,5 +119,6 @@ BOOST_TT_AUX_TEMPLATE_ARITY_SPEC(1, ::boost::detail::is_postfix_incrementable)
 
 } // namespace boost
 
+# include <boost/type_traits/detail/bool_trait_undef.hpp>
 
 #endif // IS_INCREMENTABLE_DWA200415_HPP