diff --git a/src/gui/kernel/qwindow.cpp b/src/gui/kernel/qwindow.cpp
index a6223987c2..4a40dd7e29 100644
--- a/src/gui/kernel/qwindow.cpp
+++ b/src/gui/kernel/qwindow.cpp
@@ -1662,7 +1662,7 @@ void QWindow::show()
     bool isPopup = d_func()->windowFlags & Qt::Popup & ~Qt::Window;
     if (!isPopup && qApp->styleHints()->showIsFullScreen())
         showFullScreen();
-    else if (!isPopup && QGuiApplicationPrivate::platformIntegration()->styleHint(QPlatformIntegration::ShowIsMaximized).toBool())
+    else if (!isPopup && !(d_func()->windowFlags & Qt::Dialog & ~Qt::Window) && QGuiApplicationPrivate::platformIntegration()->styleHint(QPlatformIntegration::ShowIsMaximized).toBool())
         showMaximized();
     else
         showNormal();
diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index a41d14e7d0..933294e21f 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -7012,7 +7012,7 @@ void QWidget::show()
     bool isPopup = data->window_flags & Qt::Popup & ~Qt::Window;
     if (isWindow() && !isPopup && qApp->styleHints()->showIsFullScreen())
         showFullScreen();
-    else if (isWindow() && !isPopup && QGuiApplicationPrivate::platformIntegration()->styleHint(QPlatformIntegration::ShowIsMaximized).toBool())
+    else if (isWindow() && !(data->window_flags & Qt::Dialog & ~Qt::Window) && !isPopup && QGuiApplicationPrivate::platformIntegration()->styleHint(QPlatformIntegration::ShowIsMaximized).toBool())
         showMaximized();
     else
         setVisible(true);