diff --git a/include/type_traits b/include/type_traits
index 4f84a0a5d..478b29bd1 100644
--- a/include/type_traits
+++ b/include/type_traits
@@ -946,7 +946,7 @@ template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_empty : public __libcpp_emp
 
 // is_polymorphic
 
-#if __has_feature(is_polymorphic)
+#if __has_feature(is_polymorphic) || defined(_LIBCPP_MSVC)
 
 template <class _Tp>
 struct _LIBCPP_TYPE_VIS_ONLY is_polymorphic