diff --git a/Casks/deltawalker.rb b/Casks/deltawalker.rb
index 38628a21746..18c6583afb1 100644
--- a/Casks/deltawalker.rb
+++ b/Casks/deltawalker.rb
@@ -4,7 +4,7 @@ cask :v1 => 'deltawalker' do
 
   url "https://s3.amazonaws.com/deltawalker/DeltaWalker-#{version}_64.dmg"
   homepage 'http://www.deltopia.com/compare-merge-sync/macosx/'
-  license :unknown
+  license :unknown    # todo: improve this machine-generated value
 
   app 'DeltaWalker.app'
 end