diff --git a/Casks/rrootage.rb b/Casks/rrootage.rb
index 6f2b6a21409..38e414e82a3 100644
--- a/Casks/rrootage.rb
+++ b/Casks/rrootage.rb
@@ -4,7 +4,7 @@ cask :v1 => 'rrootage' do
 
   url 'https://workram.com/downloads.php?f=rRootage', :referer => 'https://workram.com/games/rrootage'
   homepage 'http://workram.com/games/rrootage/'
-  license :unknown    # todo: improve this machine-generated value
+  license :unknown    # todo: change license and remove this comment; ':unknown' is a machine-generated placeholder
 
   app 'rRootage.app'
 end