diff --git a/libstdc++-v3/include/std/variant b/libstdc++-v3/include/std/variant
index c5138e5..54e8b67 100644
--- a/libstdc++-v3/include/std/variant
+++ b/libstdc++-v3/include/std/variant
@@ -957,6 +957,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	  __detail::__variant::__index_of_v<_Tp, _Types...>;
 
     public:
+      using _Base::_M_u;
       constexpr variant()
       noexcept(is_nothrow_default_constructible_v<__to_type<0>>) = default;
       variant(const variant&) = default;