diff --git a/vhost/src/lib.rs b/vhost/src/lib.rs
index 3c9fea8..74eece9 100644
--- a/vhost/src/lib.rs
+++ b/vhost/src/lib.rs
@@ -1,7 +1,7 @@
 // Copyright (C) 2019 Alibaba Cloud. All rights reserved.
 // SPDX-License-Identifier: Apache-2.0 or BSD-3-Clause
 
-//! Virtio Vhost Backend Drivers
+//! # Virtio Vhost Backend Drivers
 //!
 //! Virtio devices use virtqueues to transport data efficiently. The first generation of virtqueue
 //! is a set of three different single-producer, single-consumer ring structures designed to store