diff --git a/module/mr/control.php b/module/mr/control.php
index 0ce7e9a13b..346deda0ff 100644
--- a/module/mr/control.php
+++ b/module/mr/control.php
@@ -310,7 +310,11 @@ class mr extends control
         }
 
         /* The type of variable `$rawMR->message` is string. This is different with apiCreateMR. */
-        if(isset($rawMR->message)) return $this->send(array('result' => 'fail', 'message' => sprintf($this->lang->mr->apiError->sudo, $rawMR->message), 'locate' => helper::createLink('mr', 'view', "mr={$MRID}")));
+        if(isset($rawMR->message))
+        {
+            $errorMessage = $this->mr->convertApiError($rawMR->message);
+            return $this->send(array('result' => 'fail', 'message' => sprintf($this->lang->mr->apiError->sudo, $errorMessage), 'locate' => helper::createLink('mr', 'view', "mr={$MRID}")));
+        }
 
         return $this->send(array('result' => 'fail', 'message' => $this->lang->mr->mergeFailed, 'locate' => helper::createLink('mr', 'view', "mr={$MRID}")));
     }
diff --git a/module/mr/lang/en.php b/module/mr/lang/en.php
index a8dc3df6cb..8cb69dabec 100644
--- a/module/mr/lang/en.php
+++ b/module/mr/lang/en.php
@@ -112,9 +112,11 @@ $lang->mr->closeSuccess        = "Merge request closed.";
 
 $lang->mr->apiErrorMap[1] = "You can't use same project/branch for source and target";
 $lang->mr->apiErrorMap[2] = "/Another open merge request already exists for this source branch: !([0-9]+)/";
+$lang->mr->apiErrorMap[3] = "401 Unauthorized";
 
 $lang->mr->errorLang[1] = 'The source project branch cannot be the same as the target project branch';
 $lang->mr->errorLang[2] = 'Another open merge request already exists for this source branch: ID%u';
+$lang->mr->errorLang[3] = "Unauthorized";
 
 $lang->mr->from = "from";
 $lang->mr->to   = "to";
diff --git a/module/mr/lang/zh-cn.php b/module/mr/lang/zh-cn.php
index cc843282fc..1bed150255 100644
--- a/module/mr/lang/zh-cn.php
+++ b/module/mr/lang/zh-cn.php
@@ -112,9 +112,11 @@ $lang->mr->closeSuccess        = "已关闭合并请求。";
 
 $lang->mr->apiErrorMap[1] = "You can't use same project/branch for source and target";
 $lang->mr->apiErrorMap[2] = "/Another open merge request already exists for this source branch: !([0-9]+)/";
+$lang->mr->apiErrorMap[3] = "401 Unauthorized";
 
 $lang->mr->errorLang[1] = '源项目分支与目标项目分支不能相同';
 $lang->mr->errorLang[2] = '存在另外一个同样的合并请求在源项目分支中: ID%u';
+$lang->mr->errorLang[3] = '权限不足';
 
 $lang->mr->from = "从";
 $lang->mr->to   = "合并到";