diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index 212ea3a1060..dda15779afe 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -6853,6 +6853,13 @@ QWidget *QWidget::focusWidget() const
     return const_cast<QWidget *>(d_func()->focus_child);
 }
 
+QObject *QWidgetPrivate::focusObject()
+{
+    Q_Q(QWidget);
+    QWidget *proxy = deepestFocusProxy();
+    return proxy ? proxy : q;
+}
+
 /*!
     Returns the next widget in this widget's focus chain.
 
diff --git a/src/widgets/kernel/qwidget_p.h b/src/widgets/kernel/qwidget_p.h
index 2e1c4030f80..07153e71293 100644
--- a/src/widgets/kernel/qwidget_p.h
+++ b/src/widgets/kernel/qwidget_p.h
@@ -579,7 +579,7 @@ public:
     inline QRect mapFromWS(const QRect &r) const
     { return r.translated(data.wrect.topLeft()); }
 
-    virtual QObject *focusObject() { return nullptr; }
+    virtual QObject *focusObject();
 
     virtual QPlatformBackingStoreRhiConfig rhiConfig() const { return {}; }
 
diff --git a/tests/auto/widgets/util/qcompleter/tst_qcompleter.cpp b/tests/auto/widgets/util/qcompleter/tst_qcompleter.cpp
index 030bb1cf5b3..7a2b500418f 100644
--- a/tests/auto/widgets/util/qcompleter/tst_qcompleter.cpp
+++ b/tests/auto/widgets/util/qcompleter/tst_qcompleter.cpp
@@ -1687,6 +1687,7 @@ void tst_QCompleter::QTBUG_14292_filesystem()
     QTRY_VERIFY(comp.popup()->isVisible());
     QCOMPARE(comp.popup()->model()->rowCount(), 2);
     QApplication::processEvents();
+    QCOMPARE(qApp->focusObject(), &edit); // for QTBUG_108522
     QTest::keyClick(&edit, 'h');
     QCOMPARE(comp.popup()->model()->rowCount(), 2);
     QTest::keyClick(&edit, 'e');