diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index f5ad7ae06..c97d81b90 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -972,7 +972,8 @@ class InfoExtractor(object):
         """Returns a playlist"""
         video_info = {'_type': 'playlist',
                       'entries': entries}
-        video_info.update(kwargs)
+        video_info.update((key, value) for key, value in kwargs.items() if value is not None)
+
         if playlist_id:
             video_info['id'] = playlist_id
         if playlist_title: