diff --git a/include/boost/type_traits/is_const.hpp b/include/boost/type_traits/is_const.hpp
index 19b0a7f..a830737 100644
--- a/include/boost/type_traits/is_const.hpp
+++ b/include/boost/type_traits/is_const.hpp
@@ -46,7 +46,7 @@ BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T& volatile,false)
 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T& const volatile,false)
 #endif
 
-#ifdef __GNUC__
+#if defined(__GNUC__) && (__GNUC__ < 3)
 // special case for gcc where illegally cv-qualified reference types can be
 // generated in some corner cases:
 BOOST_TT_AUX_BOOL_TRAIT_PARTIAL_SPEC1_1(typename T,is_const,T const,!(::boost::is_reference<T>::value))
@@ -120,3 +120,4 @@ BOOST_TT_AUX_BOOL_TRAIT_SPEC1(is_const,void const volatile,true)
 #include "boost/type_traits/detail/bool_trait_undef.hpp"
 
 #endif // BOOST_TT_IS_CONST_HPP_INCLUDED
+