diff --git a/nixos/modules/system/boot/systemd/sysupdate.nix b/nixos/modules/system/boot/systemd/sysupdate.nix
index b1914a9c4e76..cab35ddf270c 100644
--- a/nixos/modules/system/boot/systemd/sysupdate.nix
+++ b/nixos/modules/system/boot/systemd/sysupdate.nix
@@ -71,7 +71,7 @@ in
       type = with lib.types; attrsOf format.type;
       default = { };
       example = {
-        "10-uki.conf" = {
+        "10-uki" = {
           Transfer = {
             ProtectVersion = "%A";
           };