diff --git a/Casks/josm.rb b/Casks/josm.rb
index 8744bbb3b..46f290d02 100644
--- a/Casks/josm.rb
+++ b/Casks/josm.rb
@@ -4,7 +4,7 @@ cask :v1 => 'josm' do
 
   url 'https://josm.openstreetmap.de/download/macosx/josm-macosx.zip'
   homepage 'http://josm.openstreetmap.de'
-  license :unknown    # todo: improve this machine-generated value
+  license :unknown    # todo: change license and remove this comment; ':unknown' is a machine-generated placeholder
 
   app 'JOSM.app'
 end