diff --git a/internal/distributed/datacoord/client/client.go b/internal/distributed/datacoord/client/client.go
index 6beeb3d266..927a8d1310 100644
--- a/internal/distributed/datacoord/client/client.go
+++ b/internal/distributed/datacoord/client/client.go
@@ -46,6 +46,7 @@ type Base interface {
 	Register() error
 }
 
+// Client is the datacoord grpc client
 type Client struct {
 	ctx    context.Context
 	cancel context.CancelFunc