diff --git a/internal/distributed/querynode/client/client.go b/internal/distributed/querynode/client/client.go
index 4720acf1d4..5b7e7aa8d1 100644
--- a/internal/distributed/querynode/client/client.go
+++ b/internal/distributed/querynode/client/client.go
@@ -241,6 +241,7 @@ func (c *Client) GetStatisticsChannel(ctx context.Context) (*milvuspb.StringResp
 	return ret.(*milvuspb.StringResponse), err
 }
 
+// AddQueryChannel adds query channel for QueryNode component.
 func (c *Client) AddQueryChannel(ctx context.Context, req *querypb.AddQueryChannelRequest) (*commonpb.Status, error) {
 	ret, err := c.recall(func() (interface{}, error) {
 		client, err := c.getGrpcClient()