diff --git a/nixos/doc/manual/installation/installing-virtualbox-guest.section.md b/nixos/doc/manual/installation/installing-virtualbox-guest.section.md
index a887a923e57f..19713761e9a0 100644
--- a/nixos/doc/manual/installation/installing-virtualbox-guest.section.md
+++ b/nixos/doc/manual/installation/installing-virtualbox-guest.section.md
@@ -8,7 +8,7 @@ up a VirtualBox guest, follow these instructions:
 
 1.  Base Memory Size: 768 MB or higher.
 
-1.  New Hard Disk of 8 GB or higher.
+1.  New Hard Disk of 10 GB or higher.
 
 1.  Mount the CD-ROM with the NixOS ISO (by clicking on CD/DVD-ROM)