diff --git a/rapids/views.py b/rapids/views.py
index 8e86d651..24fbb693 100755
--- a/rapids/views.py
+++ b/rapids/views.py
@@ -668,6 +668,7 @@ def mark(request, exam_pk, sk, unmarked_exam_answers_only=True, review=False):
     incorrect_answers = []
     review_user_answers = []
     unmarked_answers_bool = False
+    unmarked_user_answers = []
     # this could be improved
     if question.normal:
         incorrect_answers = question.get_user_answers()