diff --git a/judge/views/submission.py b/judge/views/submission.py
index d71ef89..13cb166 100644
--- a/judge/views/submission.py
+++ b/judge/views/submission.py
@@ -812,13 +812,10 @@ class UserContestSubmissionsAjax(UserContestSubmissions):
     template_name = "submission/user-ajax.html"
 
     def contest_time(self, s):
-        try:
-            if s.contest.participation.live:
-                if self.contest.time_limit:
-                    return s.date - s.contest.participation.real_start
-                return s.date - self.contest.start_time
-        except RelatedObjectDoesNotExist:
-            return None
+        if hasattr(s, "contest") and s.contest.participation.live:
+            if self.contest.time_limit:
+                return s.date - s.contest.participation.real_start
+            return s.date - self.contest.start_time
         return None
 
     def get_context_data(self, **kwargs):