diff --git a/api/@ohos.window.d.ts b/api/@ohos.window.d.ts
old mode 100644
new mode 100755
index 4f8707b09a74def2dbf25ccdd3254973639c848e..6897639b9e98375739223e271a7d0bf216b4ccaa
--- a/api/@ohos.window.d.ts
+++ b/api/@ohos.window.d.ts
@@ -450,6 +450,12 @@ declare namespace window {
      * @since 7
      */
     isTransparent: boolean
+
+    /**
+     * window id
+     * @since 9
+     */
+    id: number
   }
 
   /**