diff --git a/Pdf4QtLib/sources/pdfpagecontenteditortools.h b/Pdf4QtLib/sources/pdfpagecontenteditortools.h
index 568887b..4e93df0 100644
--- a/Pdf4QtLib/sources/pdfpagecontenteditortools.h
+++ b/Pdf4QtLib/sources/pdfpagecontenteditortools.h
@@ -228,7 +228,7 @@ public:
     virtual void mouseMoveEvent(QWidget* widget, QMouseEvent* event) override;
 
 protected:
-    virtual void setActiveImpl(bool active);
+    virtual void setActiveImpl(bool active) override;
 
 private:
     void resetTool();
@@ -261,7 +261,7 @@ public:
     virtual const PDFPageContentElement* getElement() const override;
     virtual PDFPageContentElement* getElement() override;
 
-    virtual void setPen(const QPen& pen);
+    virtual void setPen(const QPen& pen) override;
     virtual void setFont(const QFont& font) override;
     virtual void setAlignment(Qt::Alignment alignment) override;
 
diff --git a/Pdf4QtLib/sources/pdfpagecontentelements.h b/Pdf4QtLib/sources/pdfpagecontentelements.h
index 4e5143f..11356ee 100644
--- a/Pdf4QtLib/sources/pdfpagecontentelements.h
+++ b/Pdf4QtLib/sources/pdfpagecontentelements.h
@@ -159,7 +159,7 @@ public:
 
     virtual void performManipulation(uint mode, const QPointF& offset) override;
     virtual QRectF getBoundingBox() const override;
-    virtual void setSize(QSizeF size);
+    virtual void setSize(QSizeF size) override;
     virtual QString getDescription() const override;
 
 private:
@@ -193,7 +193,7 @@ public:
 
     virtual void performManipulation(uint mode, const QPointF& offset) override;
     virtual QRectF getBoundingBox() const override;
-    virtual void setSize(QSizeF size);
+    virtual void setSize(QSizeF size) override;
     virtual QString getDescription() const override;
 
     LineGeometry getGeometry() const;
@@ -226,7 +226,7 @@ public:
 
     virtual void performManipulation(uint mode, const QPointF& offset) override;
     virtual QRectF getBoundingBox() const override;
-    virtual void setSize(QSizeF size);
+    virtual void setSize(QSizeF size) override;
     virtual QString getDescription() const override;
 
     QPointF getPoint() const;
@@ -328,7 +328,7 @@ public:
 
     virtual void performManipulation(uint mode, const QPointF& offset) override;
     virtual QRectF getBoundingBox() const override;
-    virtual void setSize(QSizeF size);
+    virtual void setSize(QSizeF size) override;
     virtual QString getDescription() const override;
 
     const QString& getText() const;