diff --git a/course/flow.py b/course/flow.py
index eafab91029e9528e594bd3932b2e02f7eaef83e7..76f78c4847647b7f3c2d8c26981ce46b6173b9b6 100644
--- a/course/flow.py
+++ b/course/flow.py
@@ -1839,6 +1839,7 @@ def view_flow_page(pctx, flow_session_id, ordinal):
                 answer_data,
                 answer_was_graded) = post_result
 
+            prev_visit_id = prev_answer_visits[0].id
             # continue at common flow page generation below
 
     else: