diff --git a/deps/ox/src/ox/std/stddef.hpp b/deps/ox/src/ox/std/stddef.hpp
index 63eb53d3b..733d8d8ec 100644
--- a/deps/ox/src/ox/std/stddef.hpp
+++ b/deps/ox/src/ox/std/stddef.hpp
@@ -25,3 +25,9 @@
 #else
 #define OX_ALIGN4 __attribute__((aligned(4)))
 #endif
+
+#ifdef _MSC_VER
+#define OX_ALIGN8
+#else
+#define OX_ALIGN8 __attribute__((aligned(8)))
+#endif