diff --git a/mix/InverseMouseArea.cpp b/mix/InverseMouseArea.cpp
index 06159033c..869af60cf 100644
--- a/mix/InverseMouseArea.cpp
+++ b/mix/InverseMouseArea.cpp
@@ -43,7 +43,7 @@ bool InverseMouseArea::eventFilter(QObject* _obj, QEvent* _ev)
 	return false;
 }
 
-bool InverseMouseArea::contains(const QPoint& _point) const
+bool InverseMouseArea::contains(const QPointF& _point) const
 {
 	if (!this->m_active)
 		return false;
diff --git a/mix/InverseMouseArea.h b/mix/InverseMouseArea.h
index 52943bfad..893c7b9c6 100644
--- a/mix/InverseMouseArea.h
+++ b/mix/InverseMouseArea.h
@@ -41,9 +41,9 @@ public:
 	void setActive(bool _v);
 
 protected:
-	void itemChange(ItemChange _c, const ItemChangeData& _v);
-	bool eventFilter(QObject* _obj, QEvent *_ev);
-	bool contains(const QPoint& _point) const;
+	void itemChange(ItemChange _c, const ItemChangeData& _v) override;
+	bool eventFilter(QObject* _obj, QEvent *_ev) override;
+	bool contains(const QPointF& _point) const override;
 
 private:
 	bool m_active;