diff --git a/demos/piechartcustomization/mainwidget.cpp b/demos/piechartcustomization/mainwidget.cpp
index b65e862..f66ac57 100644
--- a/demos/piechartcustomization/mainwidget.cpp
+++ b/demos/piechartcustomization/mainwidget.cpp
@@ -104,14 +104,14 @@ MainWidget::MainWidget(QWidget* parent)
     m_sizeFactor->setValue(m_series->pieSize());
 
     m_startAngle = new QDoubleSpinBox();
-    m_startAngle->setMinimum(0.0);
-    m_startAngle->setMaximum(360);
+    m_startAngle->setMinimum(-720);
+    m_startAngle->setMaximum(720);
     m_startAngle->setValue(m_series->pieStartAngle());
     m_startAngle->setSingleStep(1);
 
     m_endAngle = new QDoubleSpinBox();
-    m_endAngle->setMinimum(0.0);
-    m_endAngle->setMaximum(360);
+    m_endAngle->setMinimum(-720);
+    m_endAngle->setMaximum(720);
     m_endAngle->setValue(m_series->pieEndAngle());
     m_endAngle->setSingleStep(1);
 
diff --git a/src/piechart/qpieseries.cpp b/src/piechart/qpieseries.cpp
index efc3577..a25d96f 100644
--- a/src/piechart/qpieseries.cpp
+++ b/src/piechart/qpieseries.cpp
@@ -341,8 +341,10 @@ qreal QPieSeries::pieSize() const
 void QPieSeries::setPieStartAngle(qreal angle)
 {
     Q_D(QPieSeries);
-    if (d->setRealValue(d->m_pieStartAngle, angle, d->m_pieEndAngle))
-        d->updateDerivativeData();
+    if (qFuzzyIsNull(d->m_pieStartAngle - angle))
+        return;
+    d->m_pieStartAngle = angle;
+    d->updateDerivativeData();
 }
 
 qreal QPieSeries::pieStartAngle() const
@@ -363,9 +365,10 @@ qreal QPieSeries::pieStartAngle() const
 void QPieSeries::setPieEndAngle(qreal angle)
 {
     Q_D(QPieSeries);
-
-    if (d->setRealValue(d->m_pieEndAngle, angle, 360.0, d->m_pieStartAngle))
-        d->updateDerivativeData();
+    if (qFuzzyIsNull(d->m_pieEndAngle - angle))
+        return;
+    d->m_pieEndAngle = angle;
+    d->updateDerivativeData();
 }
 
 /*!
diff --git a/tests/auto/qpieseries/tst_qpieseries.cpp b/tests/auto/qpieseries/tst_qpieseries.cpp
index 7a448bb..3f8dba6 100644
--- a/tests/auto/qpieseries/tst_qpieseries.cpp
+++ b/tests/auto/qpieseries/tst_qpieseries.cpp
@@ -234,6 +234,13 @@ void tst_qpieseries::calculatedValues()
     if (!ok)
         return;
 
+    // modify pie angles
+    s.setPieStartAngle(-90);
+    s.setPieEndAngle(90);
+    verifyCalculatedData(s, &ok);
+    if (!ok)
+        return;
+
     // clear all
     s.clear();
     verifyCalculatedData(s, &ok);