diff --git a/src/piechart/qpieslice.h b/src/piechart/qpieslice.h
index 91f090f..0975a6b 100644
--- a/src/piechart/qpieslice.h
+++ b/src/piechart/qpieslice.h
@@ -48,8 +48,8 @@ class QTCOMMERCIALCHART_EXPORT QPieSlice : public QObject
     Q_PROPERTY(QBrush labelBrush READ labelBrush WRITE setLabelBrush NOTIFY labelBrushChanged)
     Q_PROPERTY(QColor labelColor READ labelColor WRITE setLabelColor NOTIFY labelColorChanged)
     Q_PROPERTY(QFont labelFont READ labelFont WRITE setLabelFont NOTIFY labelFontChanged)
-    Q_PROPERTY(qreal labelArmLengthFactor READ labelArmLengthFactor WRITE setLabelArmLengthFactor)
-    Q_PROPERTY(qreal explodeDistanceFactor READ explodeDistanceFactor WRITE setExplodeDistanceFactor)
+    Q_PROPERTY(qreal labelArmLengthFactor READ labelArmLengthFactor WRITE setLabelArmLengthFactor NOTIFY labelArmLengthFactorChanged)
+    Q_PROPERTY(qreal explodeDistanceFactor READ explodeDistanceFactor WRITE setExplodeDistanceFactor NOTIFY explodeDistanceFactorChanged)
     Q_PROPERTY(qreal percentage READ percentage NOTIFY percentageChanged)
     Q_PROPERTY(qreal startAngle READ startAngle NOTIFY startAngleChanged)
     Q_PROPERTY(qreal angleSpan READ angleSpan NOTIFY angleSpanChanged)