diff --git a/example/piechartcustomization/main.cpp b/example/piechartcustomization/main.cpp
index 58021c7..73baa81 100644
--- a/example/piechartcustomization/main.cpp
+++ b/example/piechartcustomization/main.cpp
@@ -29,15 +29,15 @@ public Q_SLOTS:
 
     void handleHoverEnter()
     {
-        QBrush brush = this->brush();
+        QBrush brush = this->sliceBrush();
         m_originalBrush = brush;
         brush.setColor(brush.color().lighter());
-        setBrush(brush);
+        setSliceBrush(brush);
     }
 
     void handleHoverLeave()
     {
-        setBrush(m_originalBrush);
+        setSliceBrush(m_originalBrush);
     }
 
 private:
diff --git a/src/charttheme.cpp b/src/charttheme.cpp
index e555b85..1f4ebf7 100644
--- a/src/charttheme.cpp
+++ b/src/charttheme.cpp
@@ -284,8 +284,8 @@ void ChartTheme::decorate(PiePresenter* item, QPieSeries* series, int /*count*/)
     // finally update colors
     foreach (QPieSlice* s, series->slices()) {
         QColor c = colors.takeFirst();
-        s->setPen(c);
-        s->setBrush(c);
+        s->setSlicePen(c);
+        s->setSliceBrush(c);
     }
 }
 
diff --git a/src/piechart/pieslice.cpp b/src/piechart/pieslice.cpp
index a275d4a..9f3d203 100644
--- a/src/piechart/pieslice.cpp
+++ b/src/piechart/pieslice.cpp
@@ -55,8 +55,8 @@ void PieSlice::paint(QPainter* painter, const QStyleOptionGraphicsItem* /*option
     painter->setClipRect(parentItem()->boundingRect());
 
     painter->save();
-    painter->setPen(m_pen);
-    painter->setBrush(m_brush);
+    painter->setPen(m_slicePen);
+    painter->setBrush(m_sliceBrush);
     painter->drawPath(m_slicePath);
     painter->restore();
 
@@ -125,14 +125,14 @@ void PieSlice::updateData(const QPieSlice* sliceData)
     m_angleSpan = sliceData->m_angleSpan;
     m_isExploded = sliceData->isExploded();
     m_explodeDistanceFactor = sliceData->explodeDistanceFactor();
-    m_pen = sliceData->pen();
-    m_brush = sliceData->brush();
+    m_slicePen = sliceData->slicePen();
+    m_sliceBrush = sliceData->sliceBrush();
 
     m_labelVisible = sliceData->isLabelVisible();
     m_labelText = sliceData->label();
     m_labelFont = sliceData->labelFont();
     m_labelArmLengthFactor = sliceData->labelArmLengthFactor();
-    m_labelArmPen = sliceData->labelPen();
+    m_labelArmPen = sliceData->labelArmPen();
 
     updateGeometry();
     update();
diff --git a/src/piechart/pieslice_p.h b/src/piechart/pieslice_p.h
index 3d6c324..760c8c7 100644
--- a/src/piechart/pieslice_p.h
+++ b/src/piechart/pieslice_p.h
@@ -57,8 +57,8 @@ private:
     bool m_isExploded;
     qreal m_explodeDistanceFactor;
     bool m_labelVisible;
-    QPen m_pen;
-    QBrush m_brush;
+    QPen m_slicePen;
+    QBrush m_sliceBrush;
 
     QPainterPath m_labelArmPath;
     qreal m_labelArmLengthFactor;
diff --git a/src/piechart/qpieslice.cpp b/src/piechart/qpieslice.cpp
index fb8cc0b..80ce8a6 100644
--- a/src/piechart/qpieslice.cpp
+++ b/src/piechart/qpieslice.cpp
@@ -46,9 +46,9 @@ QPieSlice::QPieSlice(QObject *parent)
     m_percentage(0),
     m_startAngle(0),
     m_angleSpan(0),
-    m_pen(DEFAULT_PEN_COLOR),
-    m_brush(DEFAULT_BRUSH_COLOR),
-    m_labelPen(DEFAULT_PEN_COLOR),
+    m_slicePen(DEFAULT_PEN_COLOR),
+    m_sliceBrush(DEFAULT_BRUSH_COLOR),
+    m_labelArmPen(DEFAULT_PEN_COLOR),
     m_labelArmLengthFactor(DEFAULT_LABEL_ARM_LENGTH_FACTOR)
 {
 
@@ -69,9 +69,9 @@ QPieSlice::QPieSlice(qreal value, QString label, QObject *parent)
     m_percentage(0),
     m_startAngle(0),
     m_angleSpan(0),
-    m_pen(DEFAULT_PEN_COLOR),
-    m_brush(DEFAULT_BRUSH_COLOR),
-    m_labelPen(DEFAULT_PEN_COLOR),
+    m_slicePen(DEFAULT_PEN_COLOR),
+    m_sliceBrush(DEFAULT_BRUSH_COLOR),
+    m_labelArmPen(DEFAULT_PEN_COLOR),
     m_labelArmLengthFactor(DEFAULT_LABEL_ARM_LENGTH_FACTOR)
 {
 
@@ -176,29 +176,29 @@ qreal QPieSlice::endAngle() const
 
 /*!
     Returns the pen used to draw this slice.
-    \sa setPen()
+    \sa setSlicePen()
 */
-QPen QPieSlice::pen() const
+QPen QPieSlice::slicePen() const
 {
-    return m_pen;
+    return m_slicePen;
 }
 
 /*!
     Returns the brush used to draw this slice.
-    \sa setBrush()
+    \sa setSliceBrush()
 */
-QBrush QPieSlice::brush() const
+QBrush QPieSlice::sliceBrush() const
 {
-    return m_brush;
+    return m_sliceBrush;
 }
 
 /*!
-    Returns the pen used to draw label in this slice.
-    \sa setLabelPen()
+    Returns the pen used to draw label arm in this slice.
+    \sa setLabelArmPen()
 */
-QPen QPieSlice::labelPen() const
+QPen QPieSlice::labelArmPen() const
 {
-    return m_labelPen;
+    return m_labelArmPen;
 }
 
 /*!
@@ -328,12 +328,12 @@ void QPieSlice::setExplodeDistanceFactor(qreal factor)
 /*!
     Sets the \a pen used to draw this slice.
     Note that applying a theme will override this.
-    \sa pen()
+    \sa slicePen()
 */
-void QPieSlice::setPen(QPen pen)
+void QPieSlice::setSlicePen(const QPen &pen)
 {
-    if (m_pen != pen) {
-        m_pen = pen;
+    if (m_slicePen != pen) {
+        m_slicePen = pen;
         emit changed();
     }
 }
@@ -341,25 +341,25 @@ void QPieSlice::setPen(QPen pen)
 /*!
     Sets the \a brush used to draw this slice.
     Note that applying a theme will override this.
-    \sa brush()
+    \sa sliceBrush()
 */
-void QPieSlice::setBrush(QBrush brush)
+void QPieSlice::setSliceBrush(const QBrush &brush)
 {
-    if (m_brush != brush) {
-        m_brush = brush;
+    if (m_sliceBrush != brush) {
+        m_sliceBrush = brush;
         emit changed();
     }
 }
 
 /*!
-    Sets the \a pen used to draw the label in this slice.
+    Sets the \a pen used to draw the label arm in this slice.
     Note that applying a theme will override this.
-    \sa labelPen()
+    \sa labelArmPen()
 */
-void QPieSlice::setLabelPen(QPen pen)
+void QPieSlice::setLabelArmPen(const QPen &pen)
 {
-    if (m_labelPen != pen) {
-        m_labelPen = pen;
+    if (m_labelArmPen != pen) {
+        m_labelArmPen = pen;
         emit changed();
     }
 }
@@ -369,7 +369,7 @@ void QPieSlice::setLabelPen(QPen pen)
     Note that applying a theme will override this.
     \sa labelFont()
 */
-void QPieSlice::setLabelFont(QFont font)
+void QPieSlice::setLabelFont(const QFont &font)
 {
     if (m_labelFont != font) {
         m_labelFont = font;
diff --git a/src/piechart/qpieslice.h b/src/piechart/qpieslice.h
index 427fd75..8df8670 100644
--- a/src/piechart/qpieslice.h
+++ b/src/piechart/qpieslice.h
@@ -38,13 +38,13 @@ public:
     qreal endAngle() const;
 
     // customization
-    void setPen(QPen pen);
-    QPen pen() const;
-    void setBrush(QBrush brush);
-    QBrush brush() const;
-    void setLabelPen(QPen pen);
-    QPen labelPen() const;
-    void setLabelFont(QFont font);
+    void setSlicePen(const QPen &pen);
+    QPen slicePen() const;
+    void setSliceBrush(const QBrush &brush);
+    QBrush sliceBrush() const;
+    void setLabelArmPen(const QPen &pen);
+    QPen labelArmPen() const;
+    void setLabelFont(const QFont &font);
     QFont labelFont() const;
     void setLabelArmLengthFactor(qreal factor);
     qreal labelArmLengthFactor() const;
@@ -79,10 +79,10 @@ private:
     qreal m_angleSpan;
 
     // customization
-    QPen m_pen;
-    QBrush m_brush;
-    QPen m_labelPen;
+    QPen m_slicePen;
+    QBrush m_sliceBrush;
     QFont m_labelFont;
+    QPen m_labelArmPen;
     qreal m_labelArmLengthFactor;
 };