diff --git a/include/boost/type_traits/intrinsics.hpp b/include/boost/type_traits/intrinsics.hpp
index 90a18a2..7d97157 100644
--- a/include/boost/type_traits/intrinsics.hpp
+++ b/include/boost/type_traits/intrinsics.hpp
@@ -276,7 +276,7 @@
 #   define BOOST_IS_CLASS(T) __is_class(T)
 #   define BOOST_IS_ENUM(T) __is_enum(T)
 #   define BOOST_IS_POLYMORPHIC(T) __is_polymorphic(T)
-#   if (!defined(unix) && !defined(__unix__)) && \
+#   if (!defined(unix) && !defined(__unix__) && \
        !(defined(__VXWORKS__) && defined(__i386__)))  || defined(__LP64__)
       // GCC sometimes lies about alignment requirements
       // of type double on 32-bit unix platforms, use the