diff --git a/VM/src/lgc.cpp b/VM/src/lgc.cpp
index c5e16e43..7ff002c8 100644
--- a/VM/src/lgc.cpp
+++ b/VM/src/lgc.cpp
@@ -443,7 +443,7 @@ static void shrinkstack(lua_State* L)
 
     if (3 * size_t(s_used) < size_t(L->stacksize) && 2 * (BASIC_STACK_SIZE + EXTRA_STACK) < L->stacksize)
         luaD_reallocstack(L, L->stacksize / 2, 0); // still big enough...
-    condhardstacktests(luaD_reallocstack(L, s_used));
+    condhardstacktests(luaD_reallocstack(L, s_used, 0));
 }
 
 /*