diff --git a/protocol/json/client_response.go b/protocol/json/client_response.go
index 2b1559d..2d419ea 100644
--- a/protocol/json/client_response.go
+++ b/protocol/json/client_response.go
@@ -32,6 +32,7 @@ func (crc *ClientResponseCodec) Result(result interface{}) error {
 		if err := json.Unmarshal(*crc.res.Result, result); nil != err {
 			return err
 		}
+		return nil
 	}
 
 	return fmt.Errorf("There is no result")