diff --git a/src/widgets/widgets/qmainwindow.cpp b/src/widgets/widgets/qmainwindow.cpp
index fcf6d56c0c4..662c9db8928 100644
--- a/src/widgets/widgets/qmainwindow.cpp
+++ b/src/widgets/widgets/qmainwindow.cpp
@@ -1290,6 +1290,13 @@ bool QMainWindow::event(QEvent *event)
             return true;
 #endif // QT_CONFIG(statustip)
 
+#if QT_CONFIG(dockwidget)
+        case QEvent::Show:
+            Q_ASSERT(d->layout);
+            d->layout->showDockWidgets();
+            break;
+#endif // QT_CONFIG(dockwidget)
+
         case QEvent::StyleChange:
 #if QT_CONFIG(dockwidget)
             Q_ASSERT(d->layout);
diff --git a/src/widgets/widgets/qmainwindowlayout.cpp b/src/widgets/widgets/qmainwindowlayout.cpp
index 99357a83514..7aeab159ddf 100644
--- a/src/widgets/widgets/qmainwindowlayout.cpp
+++ b/src/widgets/widgets/qmainwindowlayout.cpp
@@ -1494,6 +1494,17 @@ inline static Qt::DockWidgetArea toDockWidgetArea(int pos)
     return QDockWidgetPrivate::toDockWidgetArea(static_cast<QInternal::DockPosition>(pos));
 }
 
+void QMainWindowLayout::showDockWidgets() const
+{
+    const auto dockWidgets = parent()->findChildren<QDockWidget *>(Qt::FindDirectChildrenOnly);
+    for (auto *dockWidget : dockWidgets)
+        dockWidget->show();
+
+    const auto groupWindows = parent()->findChildren<QDockWidgetGroupWindow *>(Qt::FindDirectChildrenOnly);
+    for (auto *groupWindow : groupWindows)
+        groupWindow->show();
+}
+
 // Checks if QDockWidgetGroupWindow or QDockWidget can be plugged the area indicated by path.
 // Returns false if called with invalid widget type or if compiled without dockwidget support.
 #if QT_CONFIG(dockwidget)
diff --git a/src/widgets/widgets/qmainwindowlayout_p.h b/src/widgets/widgets/qmainwindowlayout_p.h
index 44ecb08e204..154b2b17c06 100644
--- a/src/widgets/widgets/qmainwindowlayout_p.h
+++ b/src/widgets/widgets/qmainwindowlayout_p.h
@@ -502,6 +502,7 @@ public:
                          Qt::Orientation orientation);
     Qt::DockWidgetArea dockWidgetArea(QWidget* widget) const;
     bool restoreDockWidget(QDockWidget *dockwidget);
+    void showDockWidgets() const;
 #if QT_CONFIG(tabbar)
     void tabifyDockWidget(QDockWidget *first, QDockWidget *second);
     void raise(QDockWidget *widget);