diff --git a/website/docs/source/v2/virtualbox/configuration.html.md b/website/docs/source/v2/virtualbox/configuration.html.md
index 16f36202e..9d02ef98e 100644
--- a/website/docs/source/v2/virtualbox/configuration.html.md
+++ b/website/docs/source/v2/virtualbox/configuration.html.md
@@ -44,7 +44,7 @@ and space (the new machine contains a copy of the base box's image).
 Using linked clones can drastically reduce this overhead.
 
 Linked clones are based on a master VM, which is generated by importing the
-base box only once the first time it is required. For the linked clones only 
+base box only once the first time it is required. For the linked clones only
 differencing disk images are created where the parent disk image belongs to
 the master VM.
 
@@ -62,6 +62,9 @@ config.vm.provider 'virtualbox' do |v|
 end
 ```
 
+If you don't want backward compatbility and want to force users to
+support linked cloning, you can use `Vagrant.require_version` with 1.8.
+
 <div class="alert alert-info">
 	<strong>Note:</strong> the generated master VMs are currently not removed
 	automatically by Vagrant. This has to be done manually. However, a master