diff --git a/nixos/doc/manual/installation/installing-virtualbox-guest.xml b/nixos/doc/manual/installation/installing-virtualbox-guest.xml
index 4957b700946..019e5098a8e 100644
--- a/nixos/doc/manual/installation/installing-virtualbox-guest.xml
+++ b/nixos/doc/manual/installation/installing-virtualbox-guest.xml
@@ -83,17 +83,12 @@
   VirtualBox settings (Machine / Settings / Shared Folders, then click on the
   "Add" icon). Add the following to the
   <literal>/etc/nixos/configuration.nix</literal> to auto-mount them. If you do
-  not add <literal>"nofail"</literal>, the system will not boot properly. The
-  same goes for disabling <literal>rngd</literal> which is normally used to get
-  randomness but this does not work in virtual machines.
+  not add <literal>"nofail"</literal>, the system will not boot properly.
  </para>
 
 <programlisting>
 { config, pkgs, ...} :
 {
-  security.rngd.enable = false; // otherwise vm will not boot
-  ...
-
   fileSystems."/virtualboxshare" = {
     fsType = "vboxsf";
     device = "nameofthesharedfolder";