--- a/src/lua.h
+++ b/src/lua.h
@@ -79,7 +79,7 @@ typedef void * (*lua_Alloc) (void *ud, v
  *     not acceptable for 5.1, maybe 5.2 onwards?
  *  9: greater than existing (5.1) type values.
 */
-#define LUA_TINT (-2)
+#define LUA_TINT 9
 
 #define LUA_TNIL		0
 #define LUA_TBOOLEAN		1