diff --git a/xkcdreader/app.go b/xkcdreader/app.go
index 5ae4e70..c9c2e5b 100644
--- a/xkcdreader/app.go
+++ b/xkcdreader/app.go
@@ -31,6 +31,9 @@ func RunApp() {
 	goxkcdreader := getApp()
 	w := goxkcdreader.NewWindow(cmd.GetAppName())
 
+	// mark this window as the main window
+	w.SetMaster()
+
 	centered := container.New(
 		layout.NewHBoxLayout(),
 		layout.NewSpacer(),