diff --git a/debian12/packer.pkr.hcl b/debian12/packer.pkr.hcl
index bbdeb38..1cf9634 100644
--- a/debian12/packer.pkr.hcl
+++ b/debian12/packer.pkr.hcl
@@ -121,7 +121,7 @@ source "proxmox-iso" "template" {
   ssh_timeout              = "20m"
   ssh_username             = "root"
   ssh_password             = "${var.template_password}"
-  template_description     = "${var.template_description} - Created on ${format_date("DD-MM-YYYY", timestamp())}"
+  template_description     = "${var.template_description} - Created on ${formatdate("DD-MM-YYYY", timestamp())}"
   template_name            = "${var.template_name}"
   unmount_iso              = true
   username                 = "${var.proxmox_username}"