diff --git a/src/gpodder/config.py b/src/gpodder/config.py
index fc1d3078..36350fbd 100644
--- a/src/gpodder/config.py
+++ b/src/gpodder/config.py
@@ -208,6 +208,7 @@ defaults = {
             'two_way_sync': False,
             'use_absolute_path': True,
             'folder': 'Playlists',
+            'extension': 'm3u',
         }
 
     },
diff --git a/src/gpodder/deviceplaylist.py b/src/gpodder/deviceplaylist.py
index e4141cea..7fa94ae3 100644
--- a/src/gpodder/deviceplaylist.py
+++ b/src/gpodder/deviceplaylist.py
@@ -39,7 +39,8 @@ class gPodderDevicePlaylist(object):
     def __init__(self, config, playlist_name):
         self._config = config
         self.linebreak = '\r\n'
-        self.playlist_file = util.sanitize_filename(playlist_name, self._config.device_sync.max_filename_length) + '.m3u'
+        self.playlist_file = (util.sanitize_filename(playlist_name, self._config.device_sync.max_filename_length) +
+                             '.' + self._config.device_sync.playlists.extension)
         device_folder = util.new_gio_file(self._config.device_sync.device_folder)
         self.playlist_folder = device_folder.resolve_relative_path(self._config.device_sync.playlists.folder)