diff --git a/include/boost/utility/detail/result_of_iterate.hpp b/include/boost/utility/detail/result_of_iterate.hpp
index f63faa4..5cf30b6 100644
--- a/include/boost/utility/detail/result_of_iterate.hpp
+++ b/include/boost/utility/detail/result_of_iterate.hpp
@@ -38,7 +38,7 @@ struct tr1_result_of<F(BOOST_RESULT_OF_ARGS)>
             (boost::detail::has_result_type<F>::value)> >::type { };
 #endif
 
-#if !defined(BOOST_NO_DECLTYPE) && defined(BOOST_RESULT_OF_USE_DECLTYPE)
+#ifdef BOOST_RESULT_OF_USE_DECLTYPE
 
 // Uses declval following N3225 20.7.7.6 when F is not a pointer.
 template<typename F BOOST_PP_COMMA_IF(BOOST_PP_ITERATION())
@@ -71,7 +71,7 @@ struct cpp0x_result_of_impl<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T))>
 
 } // namespace detail 
 
-#else // !defined(BOOST_NO_DECLTYPE) && defined(BOOST_RESULT_OF_USE_DECLTYPE)
+#else // defined(BOOST_RESULT_OF_USE_DECLTYPE)
 
 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
 template<typename F BOOST_PP_COMMA_IF(BOOST_PP_ITERATION())
@@ -80,7 +80,7 @@ struct result_of<F(BOOST_RESULT_OF_ARGS)>
     : tr1_result_of<F(BOOST_RESULT_OF_ARGS)> { };
 #endif
 
-#endif // !defined(BOOST_NO_DECLTYPE) && defined(BOOST_RESULT_OF_USE_DECLTYPE)
+#endif // defined(BOOST_RESULT_OF_USE_DECLTYPE)
 
 #undef BOOST_RESULT_OF_ARGS