diff --git a/src/gui/kernel/qwindow.cpp b/src/gui/kernel/qwindow.cpp
index 57fe8fa287e..46a787e7064 100644
--- a/src/gui/kernel/qwindow.cpp
+++ b/src/gui/kernel/qwindow.cpp
@@ -2231,20 +2231,26 @@ QObject *QWindow::focusObject() const
 /*!
     Shows the window.
 
-    This is equivalent to calling showFullScreen(), showMaximized(), or showNormal(),
+    For child windows, this is equivalent to calling showNormal().
+    Otherwise, it is equivalent to calling showFullScreen(), showMaximized(), or showNormal(),
     depending on the platform's default behavior for the window type and flags.
 
     \sa showFullScreen(), showMaximized(), showNormal(), hide(), QStyleHints::showIsFullScreen(), flags()
 */
 void QWindow::show()
 {
-    Qt::WindowState defaultState = QGuiApplicationPrivate::platformIntegration()->defaultWindowState(d_func()->windowFlags);
-    if (defaultState == Qt::WindowFullScreen)
-        showFullScreen();
-    else if (defaultState == Qt::WindowMaximized)
-        showMaximized();
-    else
+    if (parent()) {
         showNormal();
+    } else {
+        const auto *platformIntegration = QGuiApplicationPrivate::platformIntegration();
+        Qt::WindowState defaultState = platformIntegration->defaultWindowState(d_func()->windowFlags);
+        if (defaultState == Qt::WindowFullScreen)
+            showFullScreen();
+        else if (defaultState == Qt::WindowMaximized)
+            showMaximized();
+        else
+            showNormal();
+    }
 }
 
 /*!
diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index f9151f6147a..f644cb53eca 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -7954,21 +7954,29 @@ void QWidget::setUpdatesEnabled(bool enable)
 /*!
     Shows the widget and its child widgets.
 
-    This is equivalent to calling showFullScreen(), showMaximized(), or setVisible(true),
-    depending on the platform's default behavior for the window flags.
+    For child windows, this is equivalent to calling setVisible(true).
+    Otherwise, it is equivalent to calling showFullScreen(), showMaximized(),
+    or setVisible(true), depending on the platform's default behavior for the window flags.
 
-     \sa raise(), showEvent(), hide(), setVisible(), showMinimized(), showMaximized(),
+    \sa raise(), showEvent(), hide(), setVisible(), showMinimized(), showMaximized(),
     showNormal(), isVisible(), windowFlags()
 */
 void QWidget::show()
 {
-    Qt::WindowState defaultState = QGuiApplicationPrivate::platformIntegration()->defaultWindowState(data->window_flags);
-    if (defaultState == Qt::WindowFullScreen)
-        showFullScreen();
-    else if (defaultState == Qt::WindowMaximized)
-        showMaximized();
-    else
-        setVisible(true); // Don't call showNormal() as not to clobber Qt::Window(Max/Min)imized
+    // Note: We don't call showNormal() as not to clobber Qt::Window(Max/Min)imized
+
+    if (!isWindow()) {
+        setVisible(true);
+    } else {
+        const auto *platformIntegration = QGuiApplicationPrivate::platformIntegration();
+        Qt::WindowState defaultState = platformIntegration->defaultWindowState(data->window_flags);
+        if (defaultState == Qt::WindowFullScreen)
+            showFullScreen();
+        else if (defaultState == Qt::WindowMaximized)
+            showMaximized();
+        else
+            setVisible(true);
+    }
 }
 
 /*! \internal