diff --git a/include/boost/function/function_base.hpp b/include/boost/function/function_base.hpp
index d4f700c..321ec67 100644
--- a/include/boost/function/function_base.hpp
+++ b/include/boost/function/function_base.hpp
@@ -372,7 +372,7 @@ public:
 void operator==(const function_base&, const function_base&);
 void operator!=(const function_base&, const function_base&);
 
-#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
+#if BOOST_WORKAROUND(BOOST_MSVC, <= 1310)
 inline bool operator==(const function_base& f,
                        detail::function::useless_clear_type*)
 {