diff --git a/main.tf b/main.tf
index 7c52095..c450908 100644
--- a/main.tf
+++ b/main.tf
@@ -38,7 +38,7 @@ resource "hcloud_server" "server" {
   backups            = try(each.value.backups, false)
   keep_disk          = try(each.value.keep_disk, false)
   user_data          = try(each.value.user_data, null)
-  placement_group_id = each.value.placement_group
+  placement_group_id = try(each.value.placement_group, null)
 
   lifecycle {
     ignore_changes = [