diff --git a/src/qchart.h b/src/qchart.h
index 3a81112..bbb8493 100644
--- a/src/qchart.h
+++ b/src/qchart.h
@@ -31,7 +31,7 @@ QTCOMMERCIALCHART_BEGIN_NAMESPACE
 class QSeries;
 class QChartAxis;
 class QLegend;
-class QChartPrivate;
+struct QChartPrivate;
 
 class QTCOMMERCIALCHART_EXPORT QChart : public QGraphicsWidget
 {
diff --git a/src/qchartview.h b/src/qchartview.h
index 957b55a..bd0078e 100644
--- a/src/qchartview.h
+++ b/src/qchartview.h
@@ -31,7 +31,7 @@ class QRubberBand;
 
 QTCOMMERCIALCHART_BEGIN_NAMESPACE
 
-class QChartViewPrivate;
+struct QChartViewPrivate;
 
 class QTCOMMERCIALCHART_EXPORT QChartView : public QGraphicsView
 {