diff --git a/demo/src/custom-cards/cast-demo-row.ts b/demo/src/custom-cards/cast-demo-row.ts
index 706ccc752e..30abc2cc3c 100644
--- a/demo/src/custom-cards/cast-demo-row.ts
+++ b/demo/src/custom-cards/cast-demo-row.ts
@@ -1,3 +1,4 @@
+/// <reference types="chromecast-caf-sender" />
 import { mdiTelevision } from "@mdi/js";
 import { css, html, LitElement, nothing } from "lit";
 import { customElement, state } from "lit/decorators";
diff --git a/src/cast/cast_manager.ts b/src/cast/cast_manager.ts
index 998263ad49..9a715433df 100644
--- a/src/cast/cast_manager.ts
+++ b/src/cast/cast_manager.ts
@@ -1,4 +1,5 @@
 /* eslint-disable no-console */
+/// <reference types="chromecast-caf-sender" />
 
 import type { Auth } from "home-assistant-js-websocket";
 import { castApiAvailable } from "./cast_framework";