diff --git a/src/widgets/widgets/qtoolbararealayout.cpp b/src/widgets/widgets/qtoolbararealayout.cpp
index 09929e72341..adddfbc5297 100644
--- a/src/widgets/widgets/qtoolbararealayout.cpp
+++ b/src/widgets/widgets/qtoolbararealayout.cpp
@@ -1328,6 +1328,10 @@ bool QToolBarAreaLayout::restoreState(QDataStream &stream, const QList<QToolBar*
             }
 
             if (applyingLayout) {
+                // Clear the previous widgetItem for the toolBar, so that it's
+                // assigned correctly in QWidgetItemV2 constructor.
+                auto *toolBarPrivate = QWidgetPrivate::get(toolBar);
+                toolBarPrivate->widgetItem = nullptr;
                 item.widgetItem = new QWidgetItemV2(toolBar);
                 toolBar->setOrientation(floating ? ((shown & 2) ? Qt::Vertical : Qt::Horizontal) : dock.o);
                 toolBar->setVisible(shown & 1);
diff --git a/tests/auto/widgets/widgets/qmainwindow/tst_qmainwindow.cpp b/tests/auto/widgets/widgets/qmainwindow/tst_qmainwindow.cpp
index 1c7ceec0eca..69965919464 100644
--- a/tests/auto/widgets/widgets/qmainwindow/tst_qmainwindow.cpp
+++ b/tests/auto/widgets/widgets/qmainwindow/tst_qmainwindow.cpp
@@ -1340,14 +1340,19 @@ void tst_QMainWindow::restoreState()
     dw.setObjectName(QLatin1String("dock"));
     mw.addDockWidget(Qt::LeftDockWidgetArea, &dw);
 
+    QWidgetPrivate *tbp = QWidgetPrivate::get(&tb);
+    QVERIFY(tbp->widgetItem);
+
     QByteArray state;
 
     state = mw.saveState();
     QVERIFY(mw.restoreState(state));
+    QVERIFY(tbp->widgetItem);
 
     state = mw.saveState(1);
     QVERIFY(!mw.restoreState(state));
     QVERIFY(mw.restoreState(state, 1));
+    QVERIFY(tbp->widgetItem);
 }
 
 //tests the restoration of the previous versions of window settings