diff --git a/external/lua/plainlua/lua-5.3.6/src/luaconf.h b/external/lua/plainlua/lua-5.3.6/src/luaconf.h
index c404f2b0a3..450794f050 100644
--- a/external/lua/plainlua/lua-5.3.6/src/luaconf.h
+++ b/external/lua/plainlua/lua-5.3.6/src/luaconf.h
@@ -801,8 +801,10 @@
 */
 #if defined(_MSC_VER)
 #define LUAI_USER_ALIGNMENT_T double
-#else
+#elif defined(__APPLE__)
 #define LUAI_USER_ALIGNMENT_T long double
+#else
+#define LUAI_USER_ALIGNMENT_T max_align_t
 #endif