diff --git a/deps/ox/src/ox/std/iterator.hpp b/deps/ox/src/ox/std/iterator.hpp
index 724a28f1..3504f950 100644
--- a/deps/ox/src/ox/std/iterator.hpp
+++ b/deps/ox/src/ox/std/iterator.hpp
@@ -8,7 +8,7 @@
 
 #pragma once
 
-#ifndef OX_USE_STDLIB
+#if !__has_include(<iterator>)
 #include "stddef.hpp"
 
 namespace std {
diff --git a/deps/ox/src/ox/std/stddef.hpp b/deps/ox/src/ox/std/stddef.hpp
index 49d517f7..3f96954f 100644
--- a/deps/ox/src/ox/std/stddef.hpp
+++ b/deps/ox/src/ox/std/stddef.hpp
@@ -10,7 +10,7 @@
 
 #include "types.hpp"
 
-#ifdef OX_USE_STDLIB
+#if __has_include(<cstddef>)
 #include <cstddef>
 #else
 #define offsetof(type, member) __builtin_offsetof(type, member)