diff --git a/rpc.go b/rpc.go
index 7134860..52b5f17 100644
--- a/rpc.go
+++ b/rpc.go
@@ -132,6 +132,15 @@ func (r *request) AddServiceApi(serviceFlag string, apiConfig *Api) error {
 	if len(apiConfig.SuccessHttpCodeList) == 0 {
 		apiConfig.SuccessHttpCodeList = serviceInfo.SuccessHttpCodeList
 	}
+	if len(apiConfig.CodeField) == 0 {
+		apiConfig.CodeField = serviceInfo.CodeField
+	}
+	if len(apiConfig.DataField) == 0 {
+		apiConfig.DataField = serviceInfo.DataField
+	}
+	if len(apiConfig.MessageField) == 0 {
+		apiConfig.MessageField = serviceInfo.MessageField
+	}
 	r.lock.Lock()
 	defer r.lock.Unlock()
 	if nil == serviceInfo.ApiTable {