diff --git a/webht/third_party/dingmail/controllers/index.php b/webht/third_party/dingmail/controllers/index.php
index 45f2d217..d4ae3513 100644
--- a/webht/third_party/dingmail/controllers/index.php
+++ b/webht/third_party/dingmail/controllers/index.php
@@ -49,7 +49,7 @@ class Index extends CI_Controller {
 				 }
 			 }else{
 				 if($unionid == null){
-					 $unionid = $this->session->userdata('dingding_user_info')->ddu_Unionid;
+					 $unionid = get_cookie('dingunionid');
 				 }
 				 $mdata['user'] = $this->ding_value_model->get_dingding_user($unionid);
 				 $mdata['user_unionid'] = $unionid;