diff --git a/zh-cn/device-dev/guide/device-wlan-led-control.md b/zh-cn/device-dev/guide/device-wlan-led-control.md
index c14fcebb21787d630d5bcdcba3fe7051dbb076c4..834a4332098799654d76f8ae76071c5a00edbf99 100644
--- a/zh-cn/device-dev/guide/device-wlan-led-control.md
+++ b/zh-cn/device-dev/guide/device-wlan-led-control.md
@@ -77,7 +77,6 @@ OpenHarmony  WLAN模组基于Hi3861平台提供了丰富的外设操作能力，
                     break;
             }
         }
-        return NULL;
     }
     ```