diff --git a/src/private/TitleBar.cpp b/src/private/TitleBar.cpp
index 037c93fe..62a68ae2 100644
--- a/src/private/TitleBar.cpp
+++ b/src/private/TitleBar.cpp
@@ -59,7 +59,7 @@ TitleBar::TitleBar(FloatingWindow *parent)
     init();
 }
 
-TitleBar::TitleBar(QWidget *parent)
+TitleBar::TitleBar(WidgetType *parent)
     : QWidgetAdapter(parent)
     , Draggable(this, /*enabled=*/false) // We don't allow dragging generic windows at this time
     , m_frame(nullptr)
@@ -337,9 +337,11 @@ bool TitleBar::isFocused() const
         return m_frame->isFocused();
     else if (m_floatingWindow)
         return m_floatingWindow->isActiveWindow();
+#ifdef KDDOCKWIDGETS_QTWIDGETS
+    // Remove ifdef in 2.0 branch.
     else if (m_genericWidget)
         return m_genericWidget->isActiveWindow();
-
+#endif
     return false;
 }
 
diff --git a/src/private/TitleBar_p.h b/src/private/TitleBar_p.h
index 313ebfbf..f81f6882 100644
--- a/src/private/TitleBar_p.h
+++ b/src/private/TitleBar_p.h
@@ -53,7 +53,7 @@ public:
 
     /// Allows TitleBar to be used in a non-dockwidget application, for example on a frameless QMessageBox on EGLFS
     /// Just so we can reuse the existing styling
-    explicit TitleBar(QWidget *parent);
+    explicit TitleBar(WidgetType *parent);
 
     ~TitleBar() override;
 
@@ -190,7 +190,7 @@ private:
 
     Frame *const m_frame;
     FloatingWindow *const m_floatingWindow;
-    QWidget *const m_genericWidget;
+    WidgetType *const m_genericWidget;
     const bool m_supportsAutoHide;
     bool m_closeButtonEnabled = true;
     bool m_floatButtonVisible = true;