diff --git a/proto/conf.go b/proto/conf.go
index e21fa8a..02abce4 100644
--- a/proto/conf.go
+++ b/proto/conf.go
@@ -83,7 +83,7 @@ func ReadConfig(path string) error {
 	worker.SetRedis("vp_stream_config", string(jsonData))
 	SigningKey = []byte(Config.TOKEN_SECRET)
 	if Config.TOKEN_SECRET == "" {
-		err = fmt.Errorf("token secret is empty," + string(jsonData))
+		err = fmt.Errorf("token secret is empty: %s", string(jsonData))
 	}
 	return err
 }