diff --git a/Application/Admin/Controller/UserController.class.php b/Application/Admin/Controller/UserController.class.php
index f1feb8ee7..59b64d639 100644
--- a/Application/Admin/Controller/UserController.class.php
+++ b/Application/Admin/Controller/UserController.class.php
@@ -358,7 +358,7 @@ function think_ucenter_md5($str, $key = 'ThinkUCenter'){
             $info['password']= (empty($pwd) || $pwd==$oldpwd)?$oldpwd:$pwd;
             $info['second_pwd']= (empty($spwd) || $spwd==$oldspwd)?$oldspwd:$spwd;
             $info['email']=$_POST['email'];
-            $info['mobile']=$_POST['mobile'];
+            $info['mobile']=isset($_POST['mobile'])?$_POST['mobile']:'';
             $ss['group_id']=$_POST['auth'];
             $ss['houtai']=$_POST['houtai'];
             $smember=$Member->where($map)->save($info);