diff --git a/Library/Homebrew/patches.rb b/Library/Homebrew/patches.rb
index ee96450edd..41cf12fef0 100644
--- a/Library/Homebrew/patches.rb
+++ b/Library/Homebrew/patches.rb
@@ -42,6 +42,7 @@ end
 class Patch
   attr_reader :compression
   attr_reader :url
+  attr_reader :download_filename
 
   def initialize patch_p, filename, url
     @patch_p = patch_p