diff --git a/packages/uni-app-types/src/ad/ad-fullscreen-video.ts b/packages/uni-app-types/src/ad/ad-fullscreen-video.ts
index 3783d94..be6a4e8 100644
--- a/packages/uni-app-types/src/ad/ad-fullscreen-video.ts
+++ b/packages/uni-app-types/src/ad/ad-fullscreen-video.ts
@@ -35,7 +35,7 @@ type _AdFullscreenVideoProps = Partial<{
   /**
    * 是否在页面就绪后加载广告数据
    *
-   * 默认为 true
+   * 默认为 `true`
    */
   preload: boolean;
   /**