diff --git a/src/Handler/Utils/Exam.hs b/src/Handler/Utils/Exam.hs
index 872d63c35..cfb4124c2 100644
--- a/src/Handler/Utils/Exam.hs
+++ b/src/Handler/Utils/Exam.hs
@@ -269,7 +269,7 @@ examAutoOccurrence :: forall seed.
 examAutoOccurrence (hash -> seed) rule ExamAutoOccurrenceConfig{..} occurrences users
   | sum occurrences' < usersCount
     || sum occurrences' <= 0
-    || Map.null users
+    || Map.null users'
   = nullResult
   | otherwise
   = case rule of