diff --git a/module/bug/control.php b/module/bug/control.php
index c424c04763..cb9bad9a16 100755
--- a/module/bug/control.php
+++ b/module/bug/control.php
@@ -985,6 +985,7 @@ class bug extends control
             parse_str($kanbanInfo, $kanbanParams);
 
             $bugData = $this->bugZen->buildBugForActivate($bugID);
+            if(!$bugData) return $this->send(array('result' => 'fail', 'message' => $this->lang->bug->error->notExist));
 
             $this->bug->activate($bugData, $kanbanParams);
             if(dao::isError()) return $this->send(array('result' => 'fail', 'message' => dao::getError()));
diff --git a/module/bug/model.php b/module/bug/model.php
index e04cff7658..06ac633a53 100644
--- a/module/bug/model.php
+++ b/module/bug/model.php
@@ -1040,7 +1040,11 @@ class bugModel extends model
     {
         $bugID  = (int)$bug->id;
         $oldBug = $this->getBaseInfo($bugID);
-        if(!$oldBug) return false;
+        if(!$oldBug)
+        {
+            dao::$errors[] = $this->lang->bug->error->notExist;
+            return false;
+        }
         if($oldBug->status != 'resolved' && $oldBug->status != 'closed')
         {
             dao::$errors[] = $this->lang->bug->error->cannotActivate;