diff --git a/yt_dlp/extractor/vk.py b/yt_dlp/extractor/vk.py
index 2f91fa2a8..7b118b0bd 100644
--- a/yt_dlp/extractor/vk.py
+++ b/yt_dlp/extractor/vk.py
@@ -921,7 +921,7 @@ def _real_extract(self, url):
                 album=title,
                 uploader=artist,
                 artists=[artist],
-                thumbnails=traverse_obj(meta, ({'url': 'coverUrl'}, ...)),
+                thumbnails=[traverse_obj(meta, {'url': 'coverUrl'})],
                 genres=[genre] if genre else [],
                 release_year=int_or_none(year),  # XXX: is None ok here?
                 modified_timestamp=int_or_none(meta.get('lastUpdated')),