diff --git a/Casks/sdformatter.rb b/Casks/sdformatter.rb
index 544d72ee1..503ba9694 100644
--- a/Casks/sdformatter.rb
+++ b/Casks/sdformatter.rb
@@ -4,7 +4,7 @@ cask :v1 => 'sdformatter' do
 
   url "https://www.sdcard.org/downloads/formatter_4/eula_mac/SDFormatter_#{version}0B.pkg"
   homepage 'https://www.sdcard.org'
-  license :unknown
+  license :unknown    # todo: improve this machine-generated value
 
   pkg "SDFormatter_#{version}0B.pkg"