5 files changed, 5 insertions, 5 deletions
diff --git a/src/plugins/General/history/dateinputdialog.h b/src/plugins/General/history/dateinputdialog.h
index 2259de255..1bcb64e68 100644
--- a/src/plugins/General/history/dateinputdialog.h
+++ b/src/plugins/General/history/dateinputdialog.h
@@ -33,7 +33,7 @@ class DateInputDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit DateInputDialog(QWidget *parent = 0);
+    explicit DateInputDialog(QWidget *parent = nullptr);
     ~DateInputDialog();
 
     QDate selectedDate() const;
diff --git a/src/plugins/General/history/history.h b/src/plugins/General/history/history.h
index 07d65be0c..d044bc0ae 100644
--- a/src/plugins/General/history/history.h
+++ b/src/plugins/General/history/history.h
@@ -36,7 +36,7 @@ class History : public QObject
 {
     Q_OBJECT
 public:
-    explicit History(QObject *parent = 0);
+    explicit History(QObject *parent = nullptr);
     ~History();
 
 private slots:
diff --git a/src/plugins/General/history/historysettingsdialog.h b/src/plugins/General/history/historysettingsdialog.h
index b21e03cd7..f9efef1b5 100644
--- a/src/plugins/General/history/historysettingsdialog.h
+++ b/src/plugins/General/history/historysettingsdialog.h
@@ -32,7 +32,7 @@ class HistorySettingsDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit HistorySettingsDialog(QWidget *parent = 0);
+    explicit HistorySettingsDialog(QWidget *parent = nullptr);
     ~HistorySettingsDialog();
 
 public slots:
diff --git a/src/plugins/General/history/historywindow.h b/src/plugins/General/history/historywindow.h
index 7736b5e7d..88d81e887 100644
--- a/src/plugins/General/history/historywindow.h
+++ b/src/plugins/General/history/historywindow.h
@@ -35,7 +35,7 @@ class HistoryWindow : public QWidget
 {
     Q_OBJECT
 public:
-    explicit HistoryWindow(QSqlDatabase db, QWidget *parent = 0);
+    explicit HistoryWindow(QSqlDatabase db, QWidget *parent = nullptr);
     ~HistoryWindow();
 
 private slots:
diff --git a/src/plugins/General/history/progressbaritemdelegate.h b/src/plugins/General/history/progressbaritemdelegate.h
index 9e8cf8e50..2eef87b91 100644
--- a/src/plugins/General/history/progressbaritemdelegate.h
+++ b/src/plugins/General/history/progressbaritemdelegate.h
@@ -35,7 +35,7 @@ class ProgressBarItemDelegate : public QStyledItemDelegate
 {
     Q_OBJECT
 public:
-    explicit ProgressBarItemDelegate(QObject *parent = 0);
+    explicit ProgressBarItemDelegate(QObject *parent = nullptr);
 
     void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const;
     QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const;