diff --git a/website/content/partials/builder/virtualbox/iso/Config-not-required.mdx b/website/content/partials/builder/virtualbox/iso/Config-not-required.mdx
index 55e348ac2..8afdf7544 100644
--- a/website/content/partials/builder/virtualbox/iso/Config-not-required.mdx
+++ b/website/content/partials/builder/virtualbox/iso/Config-not-required.mdx
@@ -18,6 +18,7 @@
   defaults to ide. When set to sata, the drive is attached to an AHCI SATA
   controller. When set to scsi, the drive is attached to an LsiLogic SCSI
   controller. When set to pcie, the drive is attached to an NVMe
+  controller. When set to virtio, the drive is attached to a VirtIO
   controller. Please note that when you use "pcie", you'll need to have
   Virtualbox 6, install an [extension
   pack](https://www.virtualbox.org/wiki/Downloads#VirtualBox6.0.14OracleVMVirtualBoxExtensionPack)
@@ -53,6 +54,7 @@
 
 - `iso_interface` (string) - The type of controller that the ISO is attached to, defaults to ide.
   When set to sata, the drive is attached to an AHCI SATA controller.
+  When set to virtio, the drive is attached to a VirtIO controller.
 
 - `keep_registered` (bool) - Set this to true if you would like to keep the VM registered with
   virtualbox. Defaults to false.