diff --git a/include/boost/type_traits/type_with_alignment.hpp b/include/boost/type_traits/type_with_alignment.hpp
index bfd5476..ffa054a 100644
--- a/include/boost/type_traits/type_with_alignment.hpp
+++ b/include/boost/type_traits/type_with_alignment.hpp
@@ -84,7 +84,7 @@ struct type_with_alignment
    typedef typename boost::detail::char_alignment<Align, boost::alignment_of<char>::value >= Align>::type type;
 };
 
-#if (defined(__GNUC__) || (defined (__SUNPRO_CC) &&  (__SUNPRO_CC >= 0x5130))) && !defined(BOOST_TT_DISABLE_INTRINSICS)
+#if (defined(__GNUC__) || (defined (__SUNPRO_CC) &&  (__SUNPRO_CC >= 0x5130)) || defined(__clang__)) && !defined(BOOST_TT_DISABLE_INTRINSICS)
 namespace tt_align_ns {
 struct __attribute__((__aligned__(2))) a2 {};
 struct __attribute__((__aligned__(4))) a4 {};