diff --git a/src/widgets/window.ts b/src/widgets/window.ts
index 8cb2647..0557a18 100644
--- a/src/widgets/window.ts
+++ b/src/widgets/window.ts
@@ -19,6 +19,7 @@ export interface WindowProps extends BaseProps<AgsWindow>, Gtk.Window.Constructo
     layer?: Layer
     margins?: number[]
     monitor?: number
+    gdkmonitor?: Gdk.Monitor
     popup?: boolean
     visible?: boolean
 }
@@ -48,6 +49,7 @@ export default class AgsWindow extends AgsWidget(Gtk.Window) {
         layer = 'top',
         margins = [],
         monitor = -1,
+        gdkmonitor = undefined,
         popup = false,
         visible = true,
         ...params
@@ -62,19 +64,26 @@ export default class AgsWindow extends AgsWidget(Gtk.Window) {
         this.layer = layer;
         this.margins = margins;
         this.monitor = monitor;
+        if (gdkmonitor)
+            this.gdkmonitor = gdkmonitor;
         this.show_all();
         this.popup = popup;
         this.visible = visible === true || visible === null && !popup;
     }
 
+    _gdkmonitor: Gdk.Monitor | null = null;
+    get gdkmonitor(): Gdk.Monitor { return this._gdkmonitor ?? this.monitor }
+    set gdkmonitor(monitor: Gdk.Monitor ) {
+        this._gdkmonitor = monitor;
+        LayerShell.set_monitor(this, monitor);
+    }
+
     get monitor(): Gdk.Monitor { return this._get('monitor'); }
-    set monitor(monitor: number | Gdk.Monitor) {
-        if (typeof monitor === "number" && monitor < 0)
+    set monitor(monitor: number) {
+        if (monitor < 0)
             return;
 
-        const m = monitor instanceof Gdk.Monitor
-            ? LayerShell.set_monitor(this, monitor)
-            : Gdk.Display.get_default()?.get_monitor(monitor);
+        const m = Gdk.Display.get_default()?.get_monitor(monitor);
         if (m) {
             LayerShell.set_monitor(this, m);
             this._set('monitor', monitor);