diff --git a/www/manager6/Utils.js b/www/manager6/Utils.js
index 0cce81d4..676f56a8 100644
--- a/www/manager6/Utils.js
+++ b/www/manager6/Utils.js
@@ -273,6 +273,13 @@ Ext.define('PVE.Utils', { utilities: {
 	return fa.join(', ');
     },
 
+    render_localtime: function(value) {
+	if (value === '__default__') {
+	    return Proxmox.Utils.defaultText + ' (' + gettext('Enabled for Windows') + ')';
+	}
+	return Proxmox.Utils.format_boolean(value);
+    },
+
     render_qga_features: function(value) {
 	if (!value) {
 	    return Proxmox.Utils.defaultText + ' (' + Proxmox.Utils.disabledText  + ')';
diff --git a/www/manager6/qemu/Options.js b/www/manager6/qemu/Options.js
index d1ca7879..5472778d 100644
--- a/www/manager6/qemu/Options.js
+++ b/www/manager6/qemu/Options.js
@@ -212,17 +212,20 @@ Ext.define('PVE.qemu.Options', {
 	    },
 	    localtime: {
 		header: gettext('Use local time for RTC'),
-		defaultValue: false,
-		renderer: Proxmox.Utils.format_boolean,
+		defaultValue: '__default__',
+		renderer: PVE.Utils.render_localtime,
 		editor: caps.vms['VM.Config.Options'] ? {
 		    xtype: 'proxmoxWindowEdit',
 		    subject: gettext('Use local time for RTC'),
 		    items: {
-			xtype: 'proxmoxcheckbox',
+			xtype: 'proxmoxKVComboBox',
 			name: 'localtime',
-			uncheckedValue: 0,
-			defaultValue: 0,
-			deleteDefaultValue: true,
+			value: '__default__',
+			comboItems: [
+			    ['__default__', PVE.Utils.render_localtime('__default__')],
+			    [1, PVE.Utils.render_localtime(1)],
+			    [0, PVE.Utils.render_localtime(0)],
+			],
 			labelWidth: 140,
 			fieldLabel: gettext('Use local time for RTC')
 		    }