diff --git a/plugins/declarative/declarativelineseries.cpp b/plugins/declarative/declarativelineseries.cpp
index de9b0ad..8ee95d4 100644
--- a/plugins/declarative/declarativelineseries.cpp
+++ b/plugins/declarative/declarativelineseries.cpp
@@ -30,6 +30,11 @@ DeclarativeLineSeries::DeclarativeLineSeries(QObject *parent) :
 {
 }
 
+QXYSeries *DeclarativeLineSeries::xySeries()
+{
+    return this;
+}
+
 QDeclarativeListProperty<QObject> DeclarativeLineSeries::declarativeChildren()
 {
     return QDeclarativeListProperty<QObject>(this, 0, &appendDeclarativeChildren);
diff --git a/plugins/declarative/declarativelineseries.h b/plugins/declarative/declarativelineseries.h
index 6219680..846767b 100644
--- a/plugins/declarative/declarativelineseries.h
+++ b/plugins/declarative/declarativelineseries.h
@@ -40,6 +40,7 @@ class DeclarativeLineSeries : public QLineSeries, public DeclarativeXySeries, pu
 
 public:
     explicit DeclarativeLineSeries(QObject *parent = 0);
+    QXYSeries *xySeries();
     QDeclarativeListProperty<QObject> declarativeChildren();
 
 public: // from QDeclarativeParserStatus
diff --git a/plugins/declarative/declarativescatterseries.cpp b/plugins/declarative/declarativescatterseries.cpp
index 15a7c3f..2560bb8 100644
--- a/plugins/declarative/declarativescatterseries.cpp
+++ b/plugins/declarative/declarativescatterseries.cpp
@@ -30,6 +30,11 @@ DeclarativeScatterSeries::DeclarativeScatterSeries(QObject *parent) :
 {
 }
 
+QXYSeries *DeclarativeScatterSeries::xySeries()
+{
+    return this;
+}
+
 QDeclarativeListProperty<QObject> DeclarativeScatterSeries::declarativeChildren()
 {
     return QDeclarativeListProperty<QObject>(this, 0, &appendDeclarativeChildren);
diff --git a/plugins/declarative/declarativescatterseries.h b/plugins/declarative/declarativescatterseries.h
index 428c4a7..ff7b1d4 100644
--- a/plugins/declarative/declarativescatterseries.h
+++ b/plugins/declarative/declarativescatterseries.h
@@ -40,6 +40,7 @@ class DeclarativeScatterSeries : public QScatterSeries, public DeclarativeXySeri
 
 public:
     explicit DeclarativeScatterSeries(QObject *parent = 0);
+    QXYSeries *xySeries();
     QDeclarativeListProperty<QObject> declarativeChildren();
     QColor brushColor();
     void setBrushColor(QColor color);
diff --git a/plugins/declarative/declarativesplineseries.cpp b/plugins/declarative/declarativesplineseries.cpp
index 4dcdff5..1c9e4e7 100644
--- a/plugins/declarative/declarativesplineseries.cpp
+++ b/plugins/declarative/declarativesplineseries.cpp
@@ -30,6 +30,11 @@ DeclarativeSplineSeries::DeclarativeSplineSeries(QObject *parent) :
 {
 }
 
+QXYSeries *DeclarativeSplineSeries::xySeries()
+{
+    return this;
+}
+
 QDeclarativeListProperty<QObject> DeclarativeSplineSeries::declarativeChildren()
 {
     return QDeclarativeListProperty<QObject>(this, 0, &appendDeclarativeChildren);
diff --git a/plugins/declarative/declarativesplineseries.h b/plugins/declarative/declarativesplineseries.h
index 880e9c6..21fa276 100644
--- a/plugins/declarative/declarativesplineseries.h
+++ b/plugins/declarative/declarativesplineseries.h
@@ -40,6 +40,7 @@ class DeclarativeSplineSeries : public QSplineSeries, public DeclarativeXySeries
 
 public:
     explicit DeclarativeSplineSeries(QObject *parent = 0);
+    QXYSeries *xySeries();
     QDeclarativeListProperty<QObject> declarativeChildren();
 
 public: // from QDeclarativeParserStatus
diff --git a/plugins/declarative/declarativexyseries.cpp b/plugins/declarative/declarativexyseries.cpp
index 07bf338..4a7ea1b 100644
--- a/plugins/declarative/declarativexyseries.cpp
+++ b/plugins/declarative/declarativexyseries.cpp
@@ -42,8 +42,9 @@ void DeclarativeXySeries::classBegin()
 
 void DeclarativeXySeries::componentComplete()
 {
-    // All the inherited objects must be of type QXYSeries, so it is safe to cast
-    QXYSeries *series = reinterpret_cast<QXYSeries *>(this);
+    QXYSeries *series = qobject_cast<QXYSeries *>(xySeries());
+    Q_ASSERT(series);
+
     foreach(QObject *child, series->children()) {
         if (qobject_cast<DeclarativeXyPoint *>(child)) {
             // TODO:
@@ -61,13 +62,15 @@ void DeclarativeXySeries::componentComplete()
 QColor DeclarativeXySeries::penColor()
 {
     // All the inherited objects must be of type QXYSeries, so it is safe to cast
-    QXYSeries *series = reinterpret_cast<QXYSeries *>(this);
+    QXYSeries *series = qobject_cast<QXYSeries *>(xySeries());
+    Q_ASSERT(series);
     return series->pen().color();
 }
 
 void DeclarativeXySeries::setPenColor(QColor color)
 {
-    QXYSeries *series = reinterpret_cast<QXYSeries *>(this);
+    QXYSeries *series = qobject_cast<QXYSeries *>(xySeries());
+    Q_ASSERT(series);
     QPen pen = series->pen();
     pen.setColor(color);
     series->setPen(pen);
@@ -75,7 +78,8 @@ void DeclarativeXySeries::setPenColor(QColor color)
 
 DeclarativeXyPoint *DeclarativeXySeries::at(int index)
 {
-    QXYSeries *series = reinterpret_cast<QXYSeries *>(this);
+    QXYSeries *series = qobject_cast<QXYSeries *>(xySeries());
+    Q_ASSERT(series);
     if (index < series->count()) {
         QPointF point = series->points().at(index);
         DeclarativeXyPoint *xyPoint = new DeclarativeXyPoint(series);
diff --git a/plugins/declarative/declarativexyseries.h b/plugins/declarative/declarativexyseries.h
index e699a1f..e00ef16 100644
--- a/plugins/declarative/declarativexyseries.h
+++ b/plugins/declarative/declarativexyseries.h
@@ -24,6 +24,7 @@
 #include "qchartglobal.h"
 #include "declarativexypoint.h"
 #include <QColor>
+#include <QXYSeries>
 
 QTCOMMERCIALCHART_BEGIN_NAMESPACE
 
@@ -39,6 +40,7 @@ public:
 public:
     void classBegin();
     void componentComplete();
+    virtual QXYSeries *xySeries() = 0;
     QColor penColor();
     void setPenColor(QColor color);
     DeclarativeXyPoint *at(int index);