diff --git a/src/qchart.cpp b/src/qchart.cpp
index b9ed712..15cf830 100644
--- a/src/qchart.cpp
+++ b/src/qchart.cpp
@@ -94,6 +94,7 @@ QChart::~QChart()
  */
 void QChart::addSeries(QSeries* series, QChartAxis* axisY)
 {
+    Q_ASSERT(series);
     d_ptr->m_dataset->addSeries(series, axisY);
 }
 
@@ -105,6 +106,7 @@ void QChart::addSeries(QSeries* series, QChartAxis* axisY)
  */
 void QChart::removeSeries(QSeries* series)
 {
+    Q_ASSERT(series);
     d_ptr->m_dataset->removeSeries(series);
 }
 
@@ -172,9 +174,9 @@ QString QChart::title() const
 {
     //TODO: refactor me
     if (d_ptr->m_presenter->m_titleItem)
-    return d_ptr->m_presenter->m_titleItem->text();
+        return d_ptr->m_presenter->m_titleItem->text();
     else
-    return QString();
+        return QString();
 }
 
 /*!
@@ -188,6 +190,14 @@ void QChart::setTitleFont(const QFont& font)
     d_ptr->m_presenter->updateLayout();
 }
 
+QFont QChart::titleFont() const
+{
+    if (d_ptr->m_presenter->m_titleItem)
+        return d_ptr->m_presenter->m_titleItem->font();
+    else
+        return QFont();
+}
+
 /*!
  Sets the \a brush used for rendering the title text.
  */
diff --git a/src/qchartview.cpp b/src/qchartview.cpp
index cc19d6f..1f72f61 100644
--- a/src/qchartview.cpp
+++ b/src/qchartview.cpp
@@ -57,6 +57,7 @@ QChartView::QChartView(QChart *chart,QWidget *parent) :
     QGraphicsView(parent),
     d_ptr(new QChartViewPrivate())
 {
+    Q_ASSERT(chart);
     d_ptr->m_scene = new QGraphicsScene(this);
     d_ptr->m_chart = chart;
     setFrameShape(QFrame::NoFrame);