diff --git a/src/modules/processing/services/nicovideo.js b/src/modules/processing/services/nicovideo.js
index eb76a123..97b34ca8 100644
--- a/src/modules/processing/services/nicovideo.js
+++ b/src/modules/processing/services/nicovideo.js
@@ -125,6 +125,7 @@ export default async function(obj) {
     return {
         urls: playlistUri,
         isM3U8: true,
-        filename: `nicovideo_${obj.id}.mp4`
+        filename: `nicovideo_${obj.id}.mp4`,
+        audioFilename: `nicovideo_${obj.id}_audio`
     } 
 }