diff --git a/lib/lib.dom.d.ts b/lib/lib.dom.d.ts
index c96d5463b9ced..63f5c61581dda 100644
--- a/lib/lib.dom.d.ts
+++ b/lib/lib.dom.d.ts
@@ -8408,6 +8408,7 @@ interface Notification extends EventTarget {
 declare var Notification: {
     prototype: Notification;
     new(title: string, options?: NotificationOptions): Notification;
+    readonly permission: NotificationPermission;
     requestPermission(callback?: NotificationPermissionCallback): Promise<NotificationPermission>;
 };
 
@@ -14801,4 +14802,4 @@ type ServiceWorkerState = "installing" | "installed" | "activating" | "activated
 type Transport = "usb" | "nfc" | "ble";
 type VideoFacingModeEnum = "user" | "environment" | "left" | "right";
 type VisibilityState = "hidden" | "visible" | "prerender" | "unloaded";
-type XMLHttpRequestResponseType = "" | "arraybuffer" | "blob" | "document" | "json" | "text";
\ No newline at end of file
+type XMLHttpRequestResponseType = "" | "arraybuffer" | "blob" | "document" | "json" | "text";