diff --git a/server/managers/RssFeedManager.js b/server/managers/RssFeedManager.js
index a066a0d32..c4681bdc2 100644
--- a/server/managers/RssFeedManager.js
+++ b/server/managers/RssFeedManager.js
@@ -2,7 +2,6 @@ const { Request, Response } = require('express')
 const Path = require('path')
 
 const Logger = require('../Logger')
-const { getAudioMimeTypeFromExtname } = require('../utils/fileUtils')
 const SocketAuthority = require('../SocketAuthority')
 const Database = require('../Database')
 
@@ -217,11 +216,6 @@ class RssFeedManager {
       res.sendStatus(404)
       return
     }
-    // Express does not set the correct mimetype for m4b files so use our defined mimetypes if available
-    const audioMimeType = getAudioMimeTypeFromExtname(Path.extname(episodePath))
-    if (audioMimeType) {
-      res.setHeader('Content-Type', audioMimeType)
-    }
     res.sendFile(episodePath)
   }