diff --git a/js/media/index.ts b/js/media/index.ts
index 9c520de1..8779f6c8 100644
--- a/js/media/index.ts
+++ b/js/media/index.ts
@@ -12,6 +12,9 @@ interface StereoBalanceNodeType extends AudioNode {
   };
 }
 
+// NOTE: While this is not technically a public API, https://winampify.io/ is
+// replacing this class with a custom version. Breaking changes to this API
+// surface should be communicated to Remi.
 export default class Media {
   _emitter: Emitter;
   _context: AudioContext;
diff --git a/js/webampLazy.tsx b/js/webampLazy.tsx
index 2bbe5d76..7b48b296 100644
--- a/js/webampLazy.tsx
+++ b/js/webampLazy.tsx
@@ -125,6 +125,7 @@ interface PrivateOptions {
     };
   };
   __butterchurnOptions: ButterchurnOptions;
+  // This is used by https://winampify.io/ to proxy through to Spotify's API.
   __customMediaClass: typeof Media; // This should have the same interface as Media
 }