diff --git a/types/phonon/index.d.ts b/types/phonon/index.d.ts
index ce07b5a19b..0a5079e3b8 100644
--- a/types/phonon/index.d.ts
+++ b/types/phonon/index.d.ts
@@ -190,6 +190,7 @@ interface Document {
 interface Window {
     on(event: string, callback: (event: Phonon.PhononCustomWindowEvent) => void, useCapture?: boolean): void;
     off(event: string, callback: (event: Phonon.PhononCustomWindowEvent) => void, useCapture?: boolean): void;
+    phonon: Phonon.Phonon;
 }
 interface Element {
     on(event: string, callback: (event: any) => void, useCapture?: boolean): void;
diff --git a/types/phonon/phonon-tests.ts b/types/phonon/phonon-tests.ts
index c31fcbbabb..b76e3282c0 100644
--- a/types/phonon/phonon-tests.ts
+++ b/types/phonon/phonon-tests.ts
@@ -550,3 +550,4 @@ phonon.options({
 });
 setupHTML();
 phonon.navigator().start();
+window.phonon;