diff --git a/ubuntu/precise64.erb b/ubuntu/precise64.erb
index 2b06794..87c9a3d 100644
--- a/ubuntu/precise64.erb
+++ b/ubuntu/precise64.erb
@@ -25,6 +25,7 @@
         <%- else -%>
         "guest_os_type": "Ubuntu_64",
         <%- end -%>
+        "headless": true,
 
         "iso_url": "http://releases.ubuntu.com/12.04/ubuntu-12.04.3-server-amd64.iso",
         "iso_checksum": "2cbe868812a871242cdcdd8f2fd6feb9",