2 files changed, 7 insertions, 6 deletions
diff --git a/examples/widgets/widgets/calendarwidget/window.cpp b/examples/widgets/widgets/calendarwidget/window.cpp
index b8a3d03552..ae10223dd4 100644
--- a/examples/widgets/widgets/calendarwidget/window.cpp
+++ b/examples/widgets/widgets/calendarwidget/window.cpp
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2020 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
@@ -126,7 +126,7 @@ void Window::selectedDateChanged()
 //! [2]
 
 //! [3]
-void Window::minimumDateChanged(const QDate &date)
+void Window::minimumDateChanged(QDate date)
 {
     calendar->setMinimumDate(date);
     maximumDateEdit->setDate(calendar->maximumDate());
@@ -134,7 +134,7 @@ void Window::minimumDateChanged(const QDate &date)
 //! [3]
 
 //! [4]
-void Window::maximumDateChanged(const QDate &date)
+void Window::maximumDateChanged(QDate date)
 {
     calendar->setMaximumDate(date);
     minimumDateEdit->setDate(calendar->minimumDate());
diff --git a/examples/widgets/widgets/calendarwidget/window.h b/examples/widgets/widgets/calendarwidget/window.h
index 83ea494fc2..1b673b8ce0 100644
--- a/examples/widgets/widgets/calendarwidget/window.h
+++ b/examples/widgets/widgets/calendarwidget/window.h
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2020 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
@@ -52,6 +52,7 @@
 #define WINDOW_H
 
 #include <QWidget>
+#include <QDateTime>
 
 QT_BEGIN_NAMESPACE
 class QCalendarWidget;
@@ -79,8 +80,8 @@ private slots:
     void horizontalHeaderChanged(int index);
     void verticalHeaderChanged(int index);
     void selectedDateChanged();
-    void minimumDateChanged(const QDate &date);
-    void maximumDateChanged(const QDate &date);
+    void minimumDateChanged(QDate date);
+    void maximumDateChanged(QDate date);
     void weekdayFormatChanged();
     void weekendFormatChanged();
     void reformatHeaders();