diff --git a/apps/media-worker/src/producer/assemble-builder.ts b/apps/media-worker/src/producer/assemble-builder.ts
index b0d9ba2..4465dd3 100644
--- a/apps/media-worker/src/producer/assemble-builder.ts
+++ b/apps/media-worker/src/producer/assemble-builder.ts
@@ -52,7 +52,7 @@ function scratchPath(path: string, field: string): string {
 }
 
 /** A downloaded source/overlay/VO file: a bare 64-hex name + known extension. */
-const SCRATCH_FILE = /^[0-9a-f]{64}\.(mp4|png|webm|m4a|aac|mp3|wav)$/;
+const SCRATCH_FILE = /^[0-9a-f]{64}\.(mp4|png|webm|m4a|aac|mp3|wav|bin)$/;;
 
 export interface AssembleClipSource {
   /** The EdlClip this input renders (its trim/rotate/volume ride along). */