diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index aed57010b..81d42c1e6 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1936,6 +1936,8 @@ module ApplicationHelper
         candown = true
       elsif attachment.container.class.to_s=="BlogComment" #博客资源允许下载
         candown = true
+      elsif attachment.container.class.to_s=="Memo" #论坛资源允许下载
+        candown = true
       elsif attachment.container.class.to_s == "User"
         candown = (attachment.is_public == 1 || attachment.is_public == true || attachment.author_id == User.current.id)
       elsif  attachment.container_type == "Bid" && attachment.container && attachment.container.courses