diff --git a/app/controllers/homework_common_controller.rb b/app/controllers/homework_common_controller.rb
index 57fa7ada5..e724846d6 100644
--- a/app/controllers/homework_common_controller.rb
+++ b/app/controllers/homework_common_controller.rb
@@ -11,7 +11,9 @@ class HomeworkCommonController < ApplicationController
   before_filter :member_of_course, :only => [:index]
 
   def index
-    update_homework_time(@course.homework_commons)
+    unless params[:page]
+      update_homework_time(@course.homework_commons)
+    end
     @new_homework = HomeworkCommon.new
     @new_homework.homework_detail_manual = HomeworkDetailManual.new
     @new_homework.course = @course