diff --git a/src/effect/offscreenquickview.cpp b/src/effect/offscreenquickview.cpp
index bb9b67ddc5..03d9960b2a 100644
--- a/src/effect/offscreenquickview.cpp
+++ b/src/effect/offscreenquickview.cpp
@@ -447,6 +447,8 @@ void OffscreenQuickView::setGeometry(const QRect &rect)
 {
     const QRect oldGeometry = d->m_view->geometry();
     d->m_view->setGeometry(rect);
+    // QWindow::setGeometry() won't sync output if there's no platform window.
+    d->m_view->setScreen(QGuiApplication::screenAt(rect.center()));
     Q_EMIT geometryChanged(oldGeometry, rect);
 }