diff --git a/oioioi/contests/utils.py b/oioioi/contests/utils.py
index 646f34156..027343004 100755
--- a/oioioi/contests/utils.py
+++ b/oioioi/contests/utils.py
@@ -614,6 +614,7 @@ def get_submission_message(request):
 def is_contest_archived(request):
     return (
         hasattr(request, 'contest')
+        and hasattr(request.contest, 'is_archived')
         and request.contest.is_archived
     )