diff --git a/internal/querycoord/query_coord.go b/internal/querycoord/query_coord.go
index f1a3db5532a2f63125b0c4c941aa49d667f0d109..a9d79c7490f3de0953d49ab0046b906443264dfb 100644
--- a/internal/querycoord/query_coord.go
+++ b/internal/querycoord/query_coord.go
@@ -321,7 +321,7 @@ func NewQueryCoord(ctx context.Context, factory msgstream.Factory) (*QueryCoord,
 	return service, nil
 }
 
-// SetRootCoord sets root coordinator's client
+// SetEtcdClient sets etcd's client
 func (qc *QueryCoord) SetEtcdClient(etcdClient *clientv3.Client) {
 	qc.etcdCli = etcdClient
 }
@@ -346,6 +346,7 @@ func (qc *QueryCoord) SetDataCoord(dataCoord types.DataCoord) error {
 	return nil
 }
 
+// SetIndexCoord sets index coordinator's client
 func (qc *QueryCoord) SetIndexCoord(indexCoord types.IndexCoord) error {
 	if indexCoord == nil {
 		return errors.New("null IndexCoord interface")