diff --git a/static/player/mode.ts b/static/player/mode.ts
index 1c45f06..9a8cbb7 100644
--- a/static/player/mode.ts
+++ b/static/player/mode.ts
@@ -87,7 +87,7 @@ export const hydrateAlternateMode = async (signal?: AbortSignal): Promise<void>
  * Switches between sub/dub mode.
  * Saves preference to localStorage, reloads video src.
  */
-export const switchMode = (mode: string): void => {
+const switchMode = (mode: string): void => {
   if (!state.playback.availableModes.includes(mode) || mode === state.playback.currentMode) return;
   state.playback.currentMode = mode;
   safeLocalStorage.setItem("player-audio-mode", mode);