diff --git a/Casks/truecrypt71a.rb b/Casks/truecrypt71a.rb
index c76df1edb..176d7320a 100644
--- a/Casks/truecrypt71a.rb
+++ b/Casks/truecrypt71a.rb
@@ -5,7 +5,7 @@ class Truecrypt71a < Cask
   url 'https://github.com/DrWhax/truecrypt-archive/raw/231bb2f64564a087de338a68fb9498320eecfe2a/TrueCrypt%207.1a%20Mac%20OS%20X.dmg'
   homepage 'http://truecrypt.sourceforge.net/'
 
-  install  'TrueCrypt 7.1a.mpkg'
+  pkg  'TrueCrypt 7.1a.mpkg'
   caveats do
     files_in_usr_local
     <<-EOS.undent