diff --git a/Casks/virtualbox422492790.rb b/Casks/virtualbox422492790.rb
index ea7a28b8b..33b7fb542 100644
--- a/Casks/virtualbox422492790.rb
+++ b/Casks/virtualbox422492790.rb
@@ -1,4 +1,4 @@
-class Virtualbox422492790 < Cask
+cask :v1 => 'virtualbox422492790' do
   version '4.2.24-92790'
   sha256 '46b422e62118a75519d24b7a0dd3a84081da3827734b25e1ee121eed5c0b6af9'