diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 410818fdb..8183ed7ad 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -436,7 +436,7 @@ class UsersController < ApplicationController
       activity = activity.reject { |e|
           ((e.act_type=="Issue") && ( !e.act.visible?(User.current))) ||
               ((e.act_type == "Journal") && (!e.act.project.visible?(User.current))) ||
-              ((e.act_type == "Bid") && (e.act.homework_for_courses.count > 0 &&
+              ((e.act_type == "Bid") && (e.act.courses.first &&
                   (!e.act.homework_for_courses.first.course.visible?(User.current) ||
                     !User.current.member_of_course?(e.act.homework_for_courses.first.course) || !User.current.admin?)))
       }
diff --git a/db/schema.rb b/db/schema.rb
index f12d6ad0a..a75c6eb29 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20141201085218) do
+ActiveRecord::Schema.define(:version => 20141210070327) do
 
   create_table "activities", :force => true do |t|
     t.integer "act_id",   :null => false