diff --git a/mobile/source/apps/flow/controllers/IndexController.php b/mobile/source/apps/flow/controllers/IndexController.php
index 69eab2c..e7735d1 100755
--- a/mobile/source/apps/flow/controllers/IndexController.php
+++ b/mobile/source/apps/flow/controllers/IndexController.php
@@ -1761,7 +1761,7 @@ class IndexController extends FrontendController {
      * 验证是否登录
      */
     public function check_login(){
-        if(!$_SESSION[user_id]){
+        if(!$_SESSION['user_id']){
             ecs_header("Location: ".U('user/login/index'));
         }
     }