diff --git a/include/boost/type_traits/detail/has_binary_operator.hpp b/include/boost/type_traits/detail/has_binary_operator.hpp
index 9f91843..f8d5e0f 100644
--- a/include/boost/type_traits/detail/has_binary_operator.hpp
+++ b/include/boost/type_traits/detail/has_binary_operator.hpp
@@ -152,10 +152,10 @@ no_operator operator,(no_operator, has_operator);
 
 template < typename Lhs, typename Rhs >
 struct operator_exists {
-   static ::boost::type_traits::yes_type check(has_operator); // this version is preferred when operator exists
-   static ::boost::type_traits::no_type check(no_operator); // this version is used otherwise
+   static ::boost::type_traits::yes_type check_(has_operator); // this version is preferred when operator exists
+   static ::boost::type_traits::no_type  check_(no_operator); // this version is used otherwise
 
-   BOOST_STATIC_CONSTANT(bool, value = (sizeof(check(((make<Lhs>() BOOST_TT_TRAIT_OP make<Rhs>()),make<has_operator>())))==sizeof(::boost::type_traits::yes_type)));
+   BOOST_STATIC_CONSTANT(bool, value = (sizeof(check_(((make<Lhs>() BOOST_TT_TRAIT_OP make<Rhs>()),make<has_operator>())))==sizeof(::boost::type_traits::yes_type)));
 };
 
 
diff --git a/include/boost/type_traits/detail/has_postfix_operator.hpp b/include/boost/type_traits/detail/has_postfix_operator.hpp
index 52b8f81..b509bb5 100644
--- a/include/boost/type_traits/detail/has_postfix_operator.hpp
+++ b/include/boost/type_traits/detail/has_postfix_operator.hpp
@@ -138,10 +138,10 @@ no_operator operator,(no_operator, has_operator);
 
 template < typename Lhs >
 struct operator_exists {
-   static ::boost::type_traits::yes_type check(has_operator); // this version is preferred when operator exists
-   static ::boost::type_traits::no_type check(no_operator); // this version is used otherwise
+   static ::boost::type_traits::yes_type check_(has_operator); // this version is preferred when operator exists
+   static ::boost::type_traits::no_type  check_(no_operator); // this version is used otherwise
 
-   BOOST_STATIC_CONSTANT(bool, value = (sizeof(check(((make<Lhs>() BOOST_TT_TRAIT_OP),make<has_operator>())))==sizeof(::boost::type_traits::yes_type)));
+   BOOST_STATIC_CONSTANT(bool, value = (sizeof(check_(((make<Lhs>() BOOST_TT_TRAIT_OP),make<has_operator>())))==sizeof(::boost::type_traits::yes_type)));
 };
 
 
diff --git a/include/boost/type_traits/detail/has_prefix_operator.hpp b/include/boost/type_traits/detail/has_prefix_operator.hpp
index 9c4ccd5..b3d397c 100644
--- a/include/boost/type_traits/detail/has_prefix_operator.hpp
+++ b/include/boost/type_traits/detail/has_prefix_operator.hpp
@@ -146,10 +146,10 @@ no_operator operator,(no_operator, has_operator);
 
 template < typename Rhs >
 struct operator_exists {
-   static ::boost::type_traits::yes_type check(has_operator); // this version is preferred when operator exists
-   static ::boost::type_traits::no_type check(no_operator); // this version is used otherwise
+   static ::boost::type_traits::yes_type check_(has_operator); // this version is preferred when operator exists
+   static ::boost::type_traits::no_type  check_(no_operator); // this version is used otherwise
 
-   BOOST_STATIC_CONSTANT(bool, value = (sizeof(check(((BOOST_TT_TRAIT_OP make<Rhs>()),make<has_operator>())))==sizeof(::boost::type_traits::yes_type)));
+   BOOST_STATIC_CONSTANT(bool, value = (sizeof(check_(((BOOST_TT_TRAIT_OP make<Rhs>()),make<has_operator>())))==sizeof(::boost::type_traits::yes_type)));
 };