diff --git a/packages/ffmpeg/src/worker.ts b/packages/ffmpeg/src/worker.ts
index 572bd60b68..cf2a9a97cf 100644
--- a/packages/ffmpeg/src/worker.ts
+++ b/packages/ffmpeg/src/worker.ts
@@ -14,6 +14,8 @@ import type {
   FFMessageCreateDirData,
   FFMessageListDirData,
   FFMessageDeleteDirData,
+  FFMessageMountData,
+  FFMessageUnmountData,
   CallbackData,
   IsFirst,
   OK,