diff --git a/src/@types/global.d.ts b/src/@types/global.d.ts
index 4aa6df5488..ef3922327a 100644
--- a/src/@types/global.d.ts
+++ b/src/@types/global.d.ts
@@ -110,6 +110,16 @@ declare global {
 
     interface HTMLAudioElement {
         type?: string;
+        // sinkId & setSinkId are experimental and typescript doesn't know about them
+        sinkId: string;
+        setSinkId(outputId: string);
+    }
+
+    interface HTMLVideoElement {
+        type?: string;
+        // sinkId & setSinkId are experimental and typescript doesn't know about them
+        sinkId: string;
+        setSinkId(outputId: string);
     }
 
     interface Element {