diff --git a/src/platform/web/Platform.js b/src/platform/web/Platform.js
index 7d5126dc..1c999598 100644
--- a/src/platform/web/Platform.js
+++ b/src/platform/web/Platform.js
@@ -143,7 +143,7 @@ export class Platform {
             this._serviceWorkerHandler = new ServiceWorkerHandler();
             this._serviceWorkerHandler.registerAndStart(assetPaths.serviceWorker);
         }
-        this.notificationService = null;
+        this.notificationService = undefined;
         // Only try to use crypto when olm is provided
         if(this._assetPaths.olm) {
             this.crypto = new Crypto(cryptoExtras);