diff --git a/app/Http/Controllers/OrderController.php b/app/Http/Controllers/OrderController.php
index 90b5f322..52d2fb41 100755
--- a/app/Http/Controllers/OrderController.php
+++ b/app/Http/Controllers/OrderController.php
@@ -68,7 +68,7 @@ class OrderController extends Controller
             abort(500, '该订阅无法续费，请更换其他订阅');
         }
 
-        if (empty($plan[$request->input('cycle')])) {
+        if ($plan[$request->input('cycle')] == NULL) {
             abort(500, '该订阅周期无法进行购买，请选择其他周期');
         }