diff --git a/plugins/dynamix.vm.manager/include/libvirt_helpers.php b/plugins/dynamix.vm.manager/include/libvirt_helpers.php
index a9f109edf..cf934b596 100644
--- a/plugins/dynamix.vm.manager/include/libvirt_helpers.php
+++ b/plugins/dynamix.vm.manager/include/libvirt_helpers.php
@@ -1165,6 +1165,7 @@
 		// settings not in the GUI, but maybe customized
 		unset($new['memoryBacking'], $new['clock'], $new['features']);
 		// preserve vnc port settings
+		unset($new['devices']['graphics']['@attributes']['port'],$new['devices']['graphics']['@attributes']['autoport']);
 		if (!$new['devices']['graphics']) unset($old['devices']['graphics']);
 		// update parent arrays
 		if (!$old['devices']['hostdev']) unset($old['devices']['hostdev']);