--- a/src/luaconf.h
+++ b/src/luaconf.h
@@ -54,7 +54,7 @@
 
 #if defined(LUA_USE_WINDOWS)
 #define LUA_DL_DLL	/* enable support for DLL */
-#define LUA_USE_C89	/* broadly, Windows is C89 */
+//#define LUA_USE_C89	/* broadly, Windows is C89 */
 #endif
 
 
