diff --git a/mo/web/org_contest.py b/mo/web/org_contest.py
index d9d8263e9a23bbdfe926939c67c091df4e6748cb..ed0eda1673c5859eddf9ca618c46418f44f466f0 100644
--- a/mo/web/org_contest.py
+++ b/mo/web/org_contest.py
@@ -368,7 +368,7 @@ class ParticipantsActionForm(FlaskForm):
 
             if self.remove_participation.data:
                 sess.delete(pion)
-                app.logger.info(f"Účast uživatele #{u.user_id} v soutěži #{pion.contest} zrušena")
+                app.logger.info(f"Web: Zrušena účast uživatele #{u.user_id} v soutěži #{pion.contest.contest_id}")
                 mo.util.log(
                     type=db.LogType.participant,
                     what=u.user_id,
@@ -387,7 +387,7 @@ class ParticipantsActionForm(FlaskForm):
 
                 if sess.is_modified(pion):
                     changes = db.get_object_changes(pion)
-                    app.logger.info(f"Účast uživatele #{u.user_id} upravena, změny: {changes}")
+                    app.logger.info(f"Web: Upravena účast uživatele #{u.user_id} v soutěži #{pion.contest.contest_id}, změny: {changes}")
                     mo.util.log(
                         type=db.LogType.participant,
                         what=u.user_id,