diff --git a/labs/lib/osbash/lib.ubuntu-12.04.4-server-amd64 b/labs/lib/osbash/lib.ubuntu-12.04.4-server-amd64
index a5af5eea..5881bdfb 100644
--- a/labs/lib/osbash/lib.ubuntu-12.04.4-server-amd64
+++ b/labs/lib/osbash/lib.ubuntu-12.04.4-server-amd64
@@ -9,6 +9,7 @@
 
 readonly ISO_URL=http://releases.ubuntu.com/12.04/ubuntu-12.04.4-server-amd64.iso
 
+# Note: Ubuntu 12.04 LTS cannot pull a preseed file over HTTPS
 readonly _PS_ssh=http://git.openstack.org/cgit/openstack/training-guides/plain/labs/lib/osbash/netboot/preseed-ssh.cfg
 readonly _PS_vbadd=http://git.openstack.org/cgit/openstack/training-guides/plain/labs/lib/osbash/netboot/preseed-vbadd.cfg
 readonly _PS_all=http://git.openstack.org/cgit/openstack/training-guides/plain/labs/lib/osbash/netboot/preseed-all.cfg