diff --git a/plugins/op_waf/tool_task.py b/plugins/op_waf/tool_task.py
index e32d1a7d4..71cdc29f8 100644
--- a/plugins/op_waf/tool_task.py
+++ b/plugins/op_waf/tool_task.py
@@ -122,7 +122,7 @@ def removeBgTask():
                 "id=?", (cfg["task_id"],)).find()
             if res and res["id"] == cfg["task_id"]:
                 data = MwCrontab.instance().delete(cfg["task_id"])
-                if data[0]:
+                if data['status']:
                     cfg["task_id"] = -1
                     mw.writeFile(getTaskConf(), '[]')
                     return True