diff --git a/demo/cast_receiver/receiver_app.js b/demo/cast_receiver/receiver_app.js
index e9de3f26b7..0d5ebf8bbd 100644
--- a/demo/cast_receiver/receiver_app.js
+++ b/demo/cast_receiver/receiver_app.js
@@ -140,7 +140,10 @@ class ShakaReceiverApp {
 ShakaReceiverApp.IDLE_TIMEOUT_MINUTES_ = 5;
 
 document.addEventListener('shaka-ui-loaded', () => {
-  // Initialize the receiver app by instantiating ShakaReceiverApp.
-  window.receiver = new ShakaReceiverApp();
-  window.receiver.init();
+  // Instantiate ShakaReceiverApp.
+  const receiver = new ShakaReceiverApp();
+  // Attach it to window so that it can be seen in a debugger.
+  window['receiver'] = receiver;
+  // Initialize the app.
+  receiver.init();
 });