diff --git a/app/models/submission.rb b/app/models/submission.rb
index 38ea16d6..d75d6019 100644
--- a/app/models/submission.rb
+++ b/app/models/submission.rb
@@ -57,7 +57,7 @@ class Submission < ActiveRecord::Base
   end
 
   def redirect_to_feedback?
-    ((user_id + exercise.created_at.to_i) % 10 == 1) && exercise.needs_more_feedback
+    ((user_id + exercise.created_at.to_i) % 10 == 1) && exercise.needs_more_feedback?
   end
 
   def own_unsolved_rfc