diff --git a/platformapi/fnpsapi/callback.go b/platformapi/fnpsapi/callback.go
index d4397ca4..8d8955d1 100644
--- a/platformapi/fnpsapi/callback.go
+++ b/platformapi/fnpsapi/callback.go
@@ -156,7 +156,7 @@ func (a *API) GetChainOrderStatusNotify(request *http.Request) (shopStatusMsg *O
 	var refundData *CallBackOrder
 	if err == nil {
 		data := utils.URLValues2Map(request.Form)
-		if err = utils.Map2StructByJson(data, &refundData, true); err == nil {
+		if err = utils.Map2StructByJson(data, &refundData, true); err != nil {
 			return nil, SignatureIsNotOk
 		}
 	}