diff --git a/include/boost/type_traits/conversion_traits.hpp b/include/boost/type_traits/conversion_traits.hpp
index c0d722a..a588ae7 100644
--- a/include/boost/type_traits/conversion_traits.hpp
+++ b/include/boost/type_traits/conversion_traits.hpp
@@ -176,6 +176,15 @@ public:
 BOOST_FLOAT_IS_CONVERTIBLE(float)
 BOOST_FLOAT_IS_CONVERTIBLE(double)
 BOOST_FLOAT_IS_CONVERTIBLE(long double)
+BOOST_FLOAT_IS_CONVERTIBLE(float const)
+BOOST_FLOAT_IS_CONVERTIBLE(double const)
+BOOST_FLOAT_IS_CONVERTIBLE(long double const)
+BOOST_FLOAT_IS_CONVERTIBLE(float volatile)
+BOOST_FLOAT_IS_CONVERTIBLE(double volatile)
+BOOST_FLOAT_IS_CONVERTIBLE(long double volatile)
+BOOST_FLOAT_IS_CONVERTIBLE(float const volatile)
+BOOST_FLOAT_IS_CONVERTIBLE(double const volatile)
+BOOST_FLOAT_IS_CONVERTIBLE(long double const volatile)
 # undef BOOST_FLOAT_IS_CONVERTIBLE
 # undef BOOST_IS_CONVERTIBLE2
 # undef BOOST_IS_CONVERTIBLE