diff --git a/en/device-dev/driver/driver-peripherals-external-des.md b/en/device-dev/driver/driver-peripherals-external-des.md
index b07fd0de343a88c73e5634ea4e6850f2ba7392ad..6520f590885d35a5201dbab3d01c4173cbf85527 100644
--- a/en/device-dev/driver/driver-peripherals-external-des.md
+++ b/en/device-dev/driver/driver-peripherals-external-des.md
@@ -3,7 +3,7 @@
- [Overview](#section729758162218)
- [WLAN Driver API Architecture](#section178022416377)
-- [Available APIs](#"Available APIs")
+- [Available APIs](#section7331102018815)
- [How to Develop](#section15957746172412)
- [Development Example](#section1395253612512)
@@ -27,7 +27,7 @@ The WLAN module provides the following three types of APIs:
**Figure 2** Available APIs of the WLAN module
![](figures/available-apis-of-the-wlan-module.png "available-apis-of-the-wlan-module")
-## Available APIs
+## Available APIs
The WLAN driver module provides APIs that can be directly called by driver developers, such as creating/releasing a **WifiModule**, connecting to/disconnecting from a WLAN hotspot, applying for/releasing a **NetBuf**, and converting between the **pbuf** structure of Lightweight IP \(lwIP\) and a **NetBuf**. [Table 1](#table1521573319472) describes some APIs.