diff --git a/src/js/stendhal/data/SoundFactory.ts b/src/js/stendhal/data/SoundFactory.ts
index d635204a743..58ef5043407 100644
--- a/src/js/stendhal/data/SoundFactory.ts
+++ b/src/js/stendhal/data/SoundFactory.ts
@@ -13,6 +13,8 @@
 
 /**
  * A playable sound.
+ *
+ * TODO: move file to `data/sound` directory
  */
 export interface SoundObject extends HTMLAudioElement {
 	/** Base volume level unique to this sound. */