diff --git a/api/@ohos.app.form.formInfo.d.ts b/api/@ohos.app.form.formInfo.d.ts
index c6c6e9245bc506618b3bef00cfa9932114d7438f..710bce3d32879488b662323de790ac33ce915f61 100644
--- a/api/@ohos.app.form.formInfo.d.ts
+++ b/api/@ohos.app.form.formInfo.d.ts
@@ -2085,12 +2085,12 @@ declare namespace formInfo {
     /**
      * The sub bundle name used by game engine.
      *
-     * @type { string }
+     * @type { ?string }
      * @syscap SystemCapability.Ability.Form
      * @systemapi
      * @since 20
      */
-    subBundleName: string;
+    subBundleName?: string;
 
     /**
      * The duration of the fun interaction form will be paused if not operate, default is 10s