diff --git a/include/boost/utility/detail/result_of_iterate.hpp b/include/boost/utility/detail/result_of_iterate.hpp
index cd21ed6..fe24a47 100644
--- a/include/boost/utility/detail/result_of_iterate.hpp
+++ b/include/boost/utility/detail/result_of_iterate.hpp
@@ -25,8 +25,8 @@
 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
 struct tr1_result_of<F(BOOST_RESULT_OF_ARGS)>
-    : mpl::if_<
-          mpl::or_< is_pointer<F>, is_member_function_pointer<F> >
+    : conditional<
+        is_pointer<F>::value || is_member_function_pointer<F>::value
         , boost::detail::tr1_result_of_impl<
             typename remove_cv<F>::type,
             typename remove_cv<F>::type(BOOST_RESULT_OF_ARGS),
@@ -46,7 +46,7 @@ struct result_of<F(BOOST_RESULT_OF_ARGS)>
 #ifdef BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK
 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
 struct result_of<F(BOOST_RESULT_OF_ARGS)>
-    : mpl::if_<mpl::or_<detail::has_result_type<F>, detail::has_result<F> >,
+    : conditional<detail::has_result_type<F>::value || detail::has_result<F>::value,
                tr1_result_of<F(BOOST_RESULT_OF_ARGS)>,
                detail::cpp0x_result_of<F(BOOST_RESULT_OF_ARGS)> >::type { };
 #endif // BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK
@@ -57,8 +57,8 @@ namespace detail {
 
 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
 struct cpp0x_result_of<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T))>
-    : mpl::if_<
-          is_member_function_pointer<F>
+    : conditional<
+          is_member_function_pointer<F>::value
         , detail::tr1_result_of_impl<
             typename remove_cv<F>::type,
             typename remove_cv<F>::type(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), false
@@ -93,11 +93,11 @@ struct BOOST_PP_CAT(result_of_callable_fun_, BOOST_PP_ITERATION())<F *>
 
 template<typename F>
 struct BOOST_PP_CAT(result_of_select_call_wrapper_type_, BOOST_PP_ITERATION())
-  : mpl::eval_if<
-        is_class<typename remove_reference<F>::type>,
+  : conditional<
+        is_class<typename remove_reference<F>::type>::value,
         result_of_wrap_callable_class<F>,
-        mpl::identity<BOOST_PP_CAT(result_of_callable_fun_, BOOST_PP_ITERATION())<typename remove_cv<typename remove_reference<F>::type>::type> >
-    >
+        type_identity<BOOST_PP_CAT(result_of_callable_fun_, BOOST_PP_ITERATION())<typename remove_cv<typename remove_reference<F>::type>::type> >
+    >::type
 {};
 
 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(), typename T)>
@@ -108,7 +108,7 @@ struct BOOST_PP_CAT(result_of_is_callable_, BOOST_PP_ITERATION()) {
             (boost::declval<wrapper_t>()(BOOST_PP_ENUM_BINARY_PARAMS(BOOST_PP_ITERATION(), boost::declval<T, >() BOOST_PP_INTERCEPT)), result_of_weird_type())
         ))
     );
-    typedef mpl::bool_<value> type;
+    typedef integral_constant<bool, value> type;
 };
 
 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
diff --git a/include/boost/utility/result_of.hpp b/include/boost/utility/result_of.hpp
index cb16d09..2976737 100644
--- a/include/boost/utility/result_of.hpp
+++ b/include/boost/utility/result_of.hpp
@@ -19,18 +19,16 @@
 #include <boost/preprocessor/facilities/intercept.hpp>
 #include <boost/detail/workaround.hpp>
 #include <boost/mpl/has_xxx.hpp>
-#include <boost/mpl/if.hpp>
-#include <boost/mpl/eval_if.hpp>
-#include <boost/mpl/bool.hpp>
-#include <boost/mpl/identity.hpp>
-#include <boost/mpl/or.hpp>
 #include <boost/type_traits/is_class.hpp>
 #include <boost/type_traits/is_pointer.hpp>
 #include <boost/type_traits/is_member_function_pointer.hpp>
 #include <boost/type_traits/remove_cv.hpp>
 #include <boost/type_traits/remove_reference.hpp>
-#include <boost/utility/declval.hpp>
-#include <boost/utility/enable_if.hpp>
+#include <boost/type_traits/declval.hpp>
+#include <boost/type_traits/conditional.hpp>
+#include <boost/type_traits/type_identity.hpp>
+#include <boost/type_traits/integral_constant.hpp>
+#include <boost/core/enable_if.hpp>
 
 #ifndef BOOST_RESULT_OF_NUM_ARGS
 #  define BOOST_RESULT_OF_NUM_ARGS 16
@@ -180,10 +178,10 @@ struct tr1_result_of_impl<F, FArgs, true>
 };
 
 template<typename FArgs>
-struct is_function_with_no_args : mpl::false_ {};
+struct is_function_with_no_args : false_type {};
 
 template<typename F>
-struct is_function_with_no_args<F(void)> : mpl::true_ {};
+struct is_function_with_no_args<F(void)> : true_type {};
 
 template<typename F, typename FArgs>
 struct result_of_nested_result : F::template result<FArgs>
@@ -191,7 +189,7 @@ struct result_of_nested_result : F::template result<FArgs>
 
 template<typename F, typename FArgs>
 struct tr1_result_of_impl<F, FArgs, false>
-  : mpl::if_<is_function_with_no_args<FArgs>,
+  : conditional<is_function_with_no_args<FArgs>::value,
              result_of_void_impl<F>,
              result_of_nested_result<F, FArgs> >::type
 {};