diff --git a/main.tf b/main.tf
index a00feb9..111a71d 100644
--- a/main.tf
+++ b/main.tf
@@ -65,6 +65,7 @@ resource "hcloud_server" "server" {
     {
       provisioner = "terraform"
       project     = var.hcloud_project
+      os          = each.value.os
     },
     {
       for index, service in try(each.value.services, []) : "service_${index + 1}" => service