diff --git a/app/controllers/polls_controller.rb b/app/controllers/polls_controller.rb
index 08d0da42f..bfa96bccf 100644
--- a/app/controllers/polls_controller.rb
+++ b/app/controllers/polls_controller.rb
@@ -792,12 +792,12 @@ class PollsController < ApplicationController
                   if the_group_setting_status == 2
                     poll_group_params = {
                       :publish_time => the_group_setting.publish_time,
-                      :end_time => poll_end_time
+                      :end_time => poll_end_time < Time.now ? the_group_setting.end_time : poll_end_time
                     }
                   elsif the_group_setting_status == 3
                     poll_group_params = {
                       :publish_time => the_group_setting.publish_time,
-                      :end_time => the_group_setting.end_time
+                      :end_time => exercise_end_time
                     }
                   end
                   the_group_setting.update_attributes(poll_group_params)