diff --git a/Casks/a-better-finder-rename.rb b/Casks/a-better-finder-rename.rb
index 1ded258c7..a24d8c734 100644
--- a/Casks/a-better-finder-rename.rb
+++ b/Casks/a-better-finder-rename.rb
@@ -5,6 +5,7 @@ class ABetterFinderRename < Cask
   url 'http://www.publicspace.net/download/ABFRX.dmg'
   appcast 'http://www.publicspace.net/app/signed_abfr9.xml'
   homepage 'http://www.publicspace.net/ABetterFinderRename/'
+  license :unknown
 
   app 'A Better Finder Rename 9.app'
 end