diff --git a/internal/distributed/querycoord/client/client.go b/internal/distributed/querycoord/client/client.go
index b472a557f3..70f5291ab1 100644
--- a/internal/distributed/querycoord/client/client.go
+++ b/internal/distributed/querycoord/client/client.go
@@ -210,6 +210,7 @@ func (c *Client) Start() error {
 	return nil
 }
 
+// Stop stops QueryCoord's grpc client server.
 func (c *Client) Stop() error {
 	c.cancel()
 	c.grpcClientMtx.Lock()