diff --git a/src/widgets/widgets/qmainwindowlayout.cpp b/src/widgets/widgets/qmainwindowlayout.cpp
index 4ce5ba4e7c5..14a8bbd857d 100644
--- a/src/widgets/widgets/qmainwindowlayout.cpp
+++ b/src/widgets/widgets/qmainwindowlayout.cpp
@@ -2727,10 +2727,12 @@ QMainWindowLayout::~QMainWindowLayout()
 
     delete statusbar;
 
+#if QT_CONFIG(dockwidget) && QT_CONFIG(tabwidget)
     // unusedTabBars contains unparented tab bars, which need to be removed manually.
     // ~QMainWindowTabBar() removes the bar from unusedTabBars => call qDeleteAll() on a copy.
     const auto bars = unusedTabBars;
     qDeleteAll(bars);
+#endif // QT_CONFIG(dockwidget) && QT_CONFIG(tabwidget)
 }
 
 void QMainWindowLayout::setDockOptions(QMainWindow::DockOptions opts)