diff --git a/Casks/audio-mate.rb b/Casks/audio-mate.rb
index 1fb89a05069..b4572fb847e 100644
--- a/Casks/audio-mate.rb
+++ b/Casks/audio-mate.rb
@@ -4,6 +4,7 @@ class AudioMate < Cask
 
   url "https://s3.amazonaws.com/apps-leftbee/products/downloadables/000/000/005/original/AudioMate-v#{version}.dmg"
   homepage 'http://audiomateapp.com/'
+  license :unknown
 
   app 'AudioMate.app'
 end