diff --git a/app/controllers/question_banks_controller.rb b/app/controllers/question_banks_controller.rb
index 76600c6a2..58fa7a8d4 100644
--- a/app/controllers/question_banks_controller.rb
+++ b/app/controllers/question_banks_controller.rb
@@ -154,6 +154,7 @@ class QuestionBanksController < ApplicationController
           att.container_id = nil
           att.container_type = nil
           att.author_id = homework.user_id
+          att.attachtype = 1
           att.copy_from = attachment.id
           att.save!
           new_homework.attachments << att