diff --git a/zh-cn/application-dev/reference/apis/js-apis-brightness.md b/zh-cn/application-dev/reference/apis/js-apis-brightness.md
index d50e4b6baffbe2e0e47bdf012df3b9b9631afd7e..bf0de9a4bbfa53cef3559bc455c1a4c417e3ebe5 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-brightness.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-brightness.md
@@ -14,7 +14,7 @@ import brightness from '@ohos.brightness';
 
 ## brightness.setValue
 
-setValue(value: number)
+setValue(value: number): void
 
 设置系统的屏幕亮度。