diff --git a/handle/api/req_sync_alarm_file.go b/handle/api/req_sync_alarm_file.go
index 9cfea8c..dec2cad 100644
--- a/handle/api/req_sync_alarm_file.go
+++ b/handle/api/req_sync_alarm_file.go
@@ -94,7 +94,7 @@ func (s *ReqSyncAlarmFile) Handle(request ziface.IRequest) {
 				"reqId":    reqId,
 				"result":   "fail",
 				"resDesc":  err.Error(),
-				"fileName": "",
+				"fileName": "null",
 			}))
 			return
 		}