diff --git a/Casks/expandrive.rb b/Casks/expandrive.rb
index f8afad30d9a..34fb5411586 100644
--- a/Casks/expandrive.rb
+++ b/Casks/expandrive.rb
@@ -5,7 +5,7 @@ cask :v1 => 'expandrive' do
   url 'http://updates.expandrive.com/apps/expandrive/download_latest'
   appcast 'http://updates.expandrive.com/appcast/expandrive.xml?version=3'
   homepage 'http://www.expandrive.com/expandrive'
-  license :unknown    # todo: improve this machine-generated value
+  license :unknown    # todo: change license and remove this comment; ':unknown' is a machine-generated placeholder
 
   app 'ExpanDrive.app'