diff --git a/app/uploaders/file_uploader.rb b/app/uploaders/file_uploader.rb
index 86d24469e0..ac719f74f6 100644
--- a/app/uploaders/file_uploader.rb
+++ b/app/uploaders/file_uploader.rb
@@ -1,6 +1,7 @@
 # encoding: utf-8
 class FileUploader < CarrierWave::Uploader::Base
   include UploaderHelper
+  MARKDOWN_PATTERN = %r{\!?\[.*?\]\(/uploads/(?<secret>[0-9a-f]{32})/(?<file>.*?)\)}
 
   storage :file