diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index 5e62e6171..5fbb2113b 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -1,8 +1,10 @@
 #include "mainwindow.h"
 
+#include <QApplication>
 #include <QCloseEvent>
 #include <QEventLoop>
 #include <QLayout>
+#include <QScreen>
 #include <QSettings>
 #include <QStyleFactory>
 #include <QToolBar>
@@ -333,8 +335,28 @@ void MainWindow::restoreWindowGeometry()
 	if (!settings.value("restore_window_geometry", true).toBool()) {
 		return;
 	}
-	restoreGeometry(settings.value("window_geometry").toByteArray());
-	restoreState(settings.value("window_state").toByteArray());
+	QVariant geometry{ settings.value("window_geometry") };
+	if (geometry.isValid()) {
+		restoreGeometry(geometry.toByteArray());
+	}
+	else {
+		const QPoint local_position{ width() / 2, 0 };
+		const QPoint global_position = mapToGlobal(local_position);
+		const QScreen* screen{ qApp->screenAt(global_position) };
+		if (screen) {
+			const QRect geometry{ screen->availableGeometry() };
+			if (screen->orientation() == Qt::LandscapeOrientation) {
+				resize(geometry.width() / 2, geometry.height());
+			}
+			else {
+				resize(geometry.width(), geometry.height() / 2);
+			}
+		}
+	}
+	QVariant state{ settings.value("window_state") };
+	if (state.isValid()) {
+		restoreState(state.toByteArray());
+	}
 }
 
 void MainWindow::setGuiAdaptiveColorEnabled(bool isEnabled)