diff --git a/internal/util/mqclient/rmq_reader.go b/internal/util/mqclient/rmq_reader.go
index eb4859535c..148678584d 100644
--- a/internal/util/mqclient/rmq_reader.go
+++ b/internal/util/mqclient/rmq_reader.go
@@ -8,6 +8,7 @@ import (
 
 var _ Reader = (*rmqReader)(nil)
 
+// rmqReader contains a rocksmq reader
 type rmqReader struct {
 	r rocksmq.Reader
 }