diff --git a/internal/querynode/flow_graph_delete_node.go b/internal/querynode/flow_graph_delete_node.go
index 12c8d4a653..786a411f80 100644
--- a/internal/querynode/flow_graph_delete_node.go
+++ b/internal/querynode/flow_graph_delete_node.go
@@ -16,6 +16,7 @@ type deleteNode struct {
 	replica ReplicaInterface // historical
 }
 
+// Name returns the name of deleteNode
 func (dNode *deleteNode) Name() string {
 	return "dNode"
 }