diff --git a/include/boost/detail/is_xxx.hpp b/include/boost/detail/is_xxx.hpp
old mode 100755
new mode 100644
index cb64fb3..3f9a126
--- a/include/boost/detail/is_xxx.hpp
+++ b/include/boost/detail/is_xxx.hpp
@@ -8,39 +8,6 @@
 # include <boost/mpl/bool.hpp>
 # include <boost/preprocessor/enum_params.hpp>
 
-# if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
-# include <boost/type_traits/is_reference.hpp>
-# include <boost/type_traits/add_reference.hpp>
-
-#  define BOOST_DETAIL_IS_XXX_DEF(name, qualified_name, nargs)          \
-template <class X_>                                                     \
-struct is_##name                                                        \
-{                                                                       \
-    typedef char yes;                                                   \
-    typedef char (&no)[2];                                              \
-                                                                        \
-    static typename add_reference<X_>::type dummy;                      \
-                                                                        \
-    struct helpers                                                      \
-    {                                                                   \
-        template < BOOST_PP_ENUM_PARAMS_Z(1, nargs, class U) >          \
-        static yes test(                                                \
-           qualified_name< BOOST_PP_ENUM_PARAMS_Z(1, nargs, U) >&, int  \
-        );                                                              \
-                                                                        \
-        template <class U>                                              \
-        static no test(U&, ...);                                        \
-    };                                                                  \
-                                                                        \
-    BOOST_STATIC_CONSTANT(                                              \
-        bool, value                                                     \
-        = !is_reference<X_>::value                                      \
-        & (sizeof(helpers::test(dummy, 0)) == sizeof(yes)));            \
-                                                                        \
-    typedef mpl::bool_<value> type;                                     \
-};
-
-# else
 
 #  define BOOST_DETAIL_IS_XXX_DEF(name, qualified_name, nargs)  \
 template <class T>                                              \
@@ -56,6 +23,5 @@ struct is_##name<                                               \
 {                                                               \
 };
 
-# endif
 
 #endif // BOOST_DETAIL_IS_XXX_DWA20051011_HPP