diff --git a/Casks/sidplay.rb b/Casks/sidplay.rb
index 1bf79ae24..b753cebba 100644
--- a/Casks/sidplay.rb
+++ b/Casks/sidplay.rb
@@ -5,7 +5,7 @@ cask :v1 => 'sidplay' do
   url 'http://www.twinbirds.com/sidplay/SIDPLAY4.zip'
   appcast 'http://www.sidmusic.org/sidplay/mac/sidplay_appcast.xml'
   homepage 'http://www.sidmusic.org/sidplay/mac/'
-  license :unknown    # todo: improve this machine-generated value
+  license :unknown    # todo: change license and remove this comment; ':unknown' is a machine-generated placeholder
 
   app 'SIDPLAY.app'
 end