diff --git a/3rd/lua/ldo.c b/3rd/lua/ldo.c
index a60972b2..b2c79399 100644
--- a/3rd/lua/ldo.c
+++ b/3rd/lua/ldo.c
@@ -191,7 +191,7 @@ int luaD_reallocstack (lua_State *L, int newsize, int raiseerror) {
       luaM_error(L);
     else return 0;  /* do not raise an error */
   }
-  for (; lim < newsize; lim++)
+  for (lim += EXTRA_STACK; lim < newsize + EXTRA_STACK; lim++)
     setnilvalue(s2v(newstack + lim)); /* erase new segment */
   correctstack(L, L->stack, newstack);
   L->stack = newstack;