diff --git a/modules/virtualisation/virtualbox-guest.nix b/modules/virtualisation/virtualbox-guest.nix
index 8e09d79e3a48..a204f56b2eed 100644
--- a/modules/virtualisation/virtualbox-guest.nix
+++ b/modules/virtualisation/virtualbox-guest.nix
@@ -38,6 +38,8 @@ if (pkgs.stdenv.isi686 || pkgs.stdenv.isx86_64) then
 
     boot.extraModulePackages = [ kernel.virtualboxGuestAdditions ];
 
+    users.extraGroups = singleton { name = "vboxsf"; };
+
     jobs.virtualbox =
       { description = "VirtualBox service";