1 files changed, 2 insertions, 2 deletions
diff --git a/src/charts/axis/datetimeaxis/qdatetimeaxis.h b/src/charts/axis/datetimeaxis/qdatetimeaxis.h
index 19a3e8ad..142ac7e0 100644
--- a/src/charts/axis/datetimeaxis/qdatetimeaxis.h
+++ b/src/charts/axis/datetimeaxis/qdatetimeaxis.h
@@ -49,11 +49,11 @@ class QT_CHARTS_EXPORT QDateTimeAxis : public QAbstractAxis
     Q_PROPERTY(QString format READ format WRITE setFormat NOTIFY formatChanged)
 
 public:
-    explicit QDateTimeAxis(QObject *parent = 0);
+    explicit QDateTimeAxis(QObject *parent = Q_NULLPTR);
     ~QDateTimeAxis();
 
 protected:
-    QDateTimeAxis(QDateTimeAxisPrivate &d, QObject *parent = 0);
+    QDateTimeAxis(QDateTimeAxisPrivate &d, QObject *parent = Q_NULLPTR);
 
 public:
     AxisType type() const;