diff --git a/src/modules/statistic_creator.py b/src/modules/statistic_creator.py
index ee81f79..a345859 100644
--- a/src/modules/statistic_creator.py
+++ b/src/modules/statistic_creator.py
@@ -408,7 +408,7 @@ def get_winrate_over_time(session: Session, player_name: str | None = None, day_
 
         all_playplayers = list(filter(lambda playplayer: boardgame_id == None or playplayer.play.boardgame.id == boardgame_id, all_playplayers))
 
-        if len(all_playplayers > 0):
+        if len(all_playplayers) > 0:
             if start_date > all_playplayers[0].play.play_date:
                 start_date = all_playplayers[0].play.play_date