diff --git a/modules/virtualisation/amazon-image.nix b/modules/virtualisation/amazon-image.nix
index 11939c9ba967..7e04f0d29114 100644
--- a/modules/virtualisation/amazon-image.nix
+++ b/modules/virtualisation/amazon-image.nix
@@ -72,6 +72,7 @@ with pkgs.lib;
   boot.kernelModules = [ "xen-netfront" ];
 
   # Generate a GRUB menu.  Amazon's pv-grub uses this to boot our kernel/initrd.
+  boot.loader.grub.version = 1;
   boot.loader.grub.device = "nodev";
   boot.loader.grub.timeout = 0;
   boot.loader.grub.extraPerEntryConfig = "root (hd0)";