diff --git a/gallery_dl/extractor/mastodon.py b/gallery_dl/extractor/mastodon.py
index d9aaafc4..3a295df8 100644
--- a/gallery_dl/extractor/mastodon.py
+++ b/gallery_dl/extractor/mastodon.py
@@ -208,6 +208,7 @@ class MastodonAPI():
             if not url:
                 return
             url = url["url"]
+            params = None
 
 
 @cache(maxage=100*365*24*3600, keyarg=0)