diff --git a/include/boost/type_traits/is_convertible.hpp b/include/boost/type_traits/is_convertible.hpp
index 3479d88..878d247 100644
--- a/include/boost/type_traits/is_convertible.hpp
+++ b/include/boost/type_traits/is_convertible.hpp
@@ -192,7 +192,11 @@ struct is_convertible_forwarder
 
 } // namespace detail
 
+#if defined(__BORLANDC__) && (__BORLANDC__ <= 0x551)
+BOOST_TT_AUX_BOOL_TRAIT_DEF2(is_convertible,From,To,(::boost::detail::is_convertible_impl<From,To>::value))
+#else
 BOOST_TT_AUX_BOOL_TRAIT_DEF2(is_convertible,From,To,(::boost::detail::is_convertible_forwarder<From,To>::value))
+#endif
 
 //
 // Now add the full and partial specialisations
@@ -284,3 +288,4 @@ TT_AUX_IS_CONVERTIBLE_FROM_FLOAT_CV_SPEC(long double)
 
 #endif // BOOST_TT_IS_CONVERTIBLE_HPP_INCLUDED
 
+