diff --git a/include/boost/type_traits/is_signed.hpp b/include/boost/type_traits/is_signed.hpp
index 9546097..b283b21 100644
--- a/include/boost/type_traits/is_signed.hpp
+++ b/include/boost/type_traits/is_signed.hpp
@@ -62,8 +62,6 @@ struct is_signed_select_helper<false>
    };
 };
 
-}
-
 template <class T>
 struct is_signed
 {
@@ -73,6 +71,10 @@ struct is_signed
    BOOST_STATIC_CONSTANT(bool, value = type::value);
 };
 
+}
+
+template <class T> struct is_signed : public integral_constant<bool, boost::detail::is_signed<T>::value> {};
+
 #else
 
 template <class T> struct is_signed : public false_type{};
diff --git a/include/boost/type_traits/is_unsigned.hpp b/include/boost/type_traits/is_unsigned.hpp
index 29d30e9..7243771 100644
--- a/include/boost/type_traits/is_unsigned.hpp
+++ b/include/boost/type_traits/is_unsigned.hpp
@@ -42,7 +42,7 @@ struct is_ununsigned_helper
 };
 
 template <bool integral_type>
-struct is_ununsigned_select_helper
+struct is_unsigned_select_helper
 {
    template <class T>
    struct rebind
@@ -52,7 +52,7 @@ struct is_ununsigned_select_helper
 };
 
 template <>
-struct is_ununsigned_select_helper<false>
+struct is_unsigned_select_helper<false>
 {
    template <class T>
    struct rebind
@@ -61,17 +61,19 @@ struct is_ununsigned_select_helper<false>
    };
 };
 
-} // namespace detail
-
 template <class T>
 struct is_unsigned
 {
-   typedef detail::is_ununsigned_select_helper< ::boost::is_integral<T>::value || ::boost::is_enum<T>::value > selector;
+   typedef detail::is_unsigned_select_helper< ::boost::is_integral<T>::value || ::boost::is_enum<T>::value > selector;
    typedef typename selector::template rebind<T> binder;
    typedef typename binder::type type;
    BOOST_STATIC_CONSTANT(bool, value = type::value);
 };
 
+} // namespace detail
+
+template <class T> struct is_unsigned : public integral_constant<bool, boost::detail::is_unsigned<T>::value> {};
+
 #else
 
 template <class T> struct is_unsigned : public false_type{};