diff --git a/examples/stackedbarchartdrilldown/drilldownchart.cpp b/examples/stackedbarchartdrilldown/drilldownchart.cpp
index 14405fa..46ddf39 100644
--- a/examples/stackedbarchartdrilldown/drilldownchart.cpp
+++ b/examples/stackedbarchartdrilldown/drilldownchart.cpp
@@ -31,9 +31,8 @@ DrilldownChart::DrilldownChart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
 
 void DrilldownChart::changeSeries(QAbstractSeries *series)
 {
-    if (m_currentSeries) {
+    if (m_currentSeries)
         removeSeries(m_currentSeries);
-    }
     m_currentSeries = series;
     addSeries(series);
     setTitle(series->name());
@@ -43,7 +42,6 @@ void DrilldownChart::changeSeries(QAbstractSeries *series)
 void DrilldownChart::handleClicked(QBarSet *barset, QString category)
 {
     Q_UNUSED(barset)
-    Q_UNUSED(button)
     DrilldownBarSeries* series = static_cast<DrilldownBarSeries*> (sender());
     changeSeries(series->drilldownSeries(category));
 }
diff --git a/src/barchart/bar.cpp b/src/barchart/bar.cpp
index 1576d0a..33d0da2 100644
--- a/src/barchart/bar.cpp
+++ b/src/barchart/bar.cpp
@@ -35,6 +35,7 @@ Bar::Bar(QBarSet *barset, QString category, QGraphicsItem *parent) : QGraphicsRe
 
 void Bar::mousePressEvent(QGraphicsSceneMouseEvent *event)
 {
+    Q_UNUSED(event)
     emit clicked(m_category);
     emit clicked(m_barset, m_category);
 }