diff --git a/deps/ox/src/ox/std/typetraits.hpp b/deps/ox/src/ox/std/typetraits.hpp
index 5810b245..4b480f47 100644
--- a/deps/ox/src/ox/std/typetraits.hpp
+++ b/deps/ox/src/ox/std/typetraits.hpp
@@ -143,7 +143,7 @@ template<typename T>
 constexpr bool memberable(...) { return false; }
 
 template<typename T>
-struct is_class: integral_constant<bool, !is_union<T>::value && memberable<T>(0)> {};
+struct is_class: integral_constant<bool, !is_union_v<T> && memberable<T>(nullptr)> {};
 
 namespace test {
 struct TestClass {int i;};