diff --git a/internal/distributed/datanode/service.go b/internal/distributed/datanode/service.go
index c7e8e5412b..c9cf35a215 100644
--- a/internal/distributed/datanode/service.go
+++ b/internal/distributed/datanode/service.go
@@ -70,7 +70,7 @@ type Server struct {
 	closer io.Closer
 }
 
-// NewServer new data node grpc server
+// NewServer new DataNode grpc server
 func NewServer(ctx context.Context, factory msgstream.Factory) (*Server, error) {
 	ctx1, cancel := context.WithCancel(ctx)
 	var s = &Server{