diff --git a/update_db.py b/update_db.py
index 1fdff8a..fc529de 100644
--- a/update_db.py
+++ b/update_db.py
@@ -62,7 +62,7 @@ def update_tables (
         video_history.views_count = datum['viewCounter']
         video_history.upsert ()
         video_tags = [video_tag for video_tag in video.video_tags
-                                if video_tag.untagged_at is not None]
+                                if video_tag.untagged_at is None]
         tag: Tag | None
         video_tag: VideoTag | None
         for video_tag in video_tags: