diff --git a/plugins/dynamix.vm.manager/include/libvirt_helpers.php b/plugins/dynamix.vm.manager/include/libvirt_helpers.php
index b55392ee5..2a36635e6 100644
--- a/plugins/dynamix.vm.manager/include/libvirt_helpers.php
+++ b/plugins/dynamix.vm.manager/include/libvirt_helpers.php
@@ -1127,7 +1127,7 @@
 		if (!$old['devices']['hostdev']) unset($old['devices']['hostdev']);
 		if (!$new['devices']['hostdev']) unset($new['devices']['hostdev']);
 		// remove existing auto-generated settings
-		unset($old['cputune']['vcpupin'],$old['devices']['graphics'],$old['devices']['video'],$old['devices']['disk'],$old['devices']['interface'],$old['cpu']['@attributes']);
+		unset($old['cputune']['vcpupin'],$old['devices']['graphics'],$old['devices']['video'],$old['devices']['disk'],$old['devices']['interface'],$old['cpu']['@attributes'],$old['os']['boot']);
 		// set namespace
 		$new['metadata']['vmtemplate']['@attributes']['xmlns'] = 'unraid';
 	}