5 files changed, 12 insertions, 12 deletions
diff --git a/src/widgets/util/qcompleter.h b/src/widgets/util/qcompleter.h
index 22230fc39e..32ee6296ca 100644
--- a/src/widgets/util/qcompleter.h
+++ b/src/widgets/util/qcompleter.h
@@ -76,10 +76,10 @@ public:
         CaseInsensitivelySortedModel
     };
 
-    QCompleter(QObject *parent = 0);
-    QCompleter(QAbstractItemModel *model, QObject *parent = 0);
+    QCompleter(QObject *parent = Q_NULLPTR);
+    QCompleter(QAbstractItemModel *model, QObject *parent = Q_NULLPTR);
 #ifndef QT_NO_STRINGLISTMODEL
-    QCompleter(const QStringList& completions, QObject *parent = 0);
+    QCompleter(const QStringList& completions, QObject *parent = Q_NULLPTR);
 #endif
     ~QCompleter();
 
diff --git a/src/widgets/util/qsystemtrayicon.h b/src/widgets/util/qsystemtrayicon.h
index a4da0861e9..aba126b4fc 100644
--- a/src/widgets/util/qsystemtrayicon.h
+++ b/src/widgets/util/qsystemtrayicon.h
@@ -59,8 +59,8 @@ class Q_WIDGETS_EXPORT QSystemTrayIcon : public QObject
     Q_PROPERTY(bool visible READ isVisible WRITE setVisible DESIGNABLE false)
 
 public:
-    QSystemTrayIcon(QObject *parent = 0);
-    QSystemTrayIcon(const QIcon &icon, QObject *parent = 0);
+    QSystemTrayIcon(QObject *parent = Q_NULLPTR);
+    QSystemTrayIcon(const QIcon &icon, QObject *parent = Q_NULLPTR);
     ~QSystemTrayIcon();
 
     enum ActivationReason {
diff --git a/src/widgets/util/qundogroup.h b/src/widgets/util/qundogroup.h
index ea4b226a18..ec6e67f4d3 100644
--- a/src/widgets/util/qundogroup.h
+++ b/src/widgets/util/qundogroup.h
@@ -52,7 +52,7 @@ class Q_WIDGETS_EXPORT QUndoGroup : public QObject
     Q_DECLARE_PRIVATE(QUndoGroup)
 
 public:
-    explicit QUndoGroup(QObject *parent = 0);
+    explicit QUndoGroup(QObject *parent = Q_NULLPTR);
     ~QUndoGroup();
 
     void addStack(QUndoStack *stack);
diff --git a/src/widgets/util/qundostack.h b/src/widgets/util/qundostack.h
index f6589da4ec..0b14a442c2 100644
--- a/src/widgets/util/qundostack.h
+++ b/src/widgets/util/qundostack.h
@@ -51,8 +51,8 @@ class Q_WIDGETS_EXPORT QUndoCommand
     QUndoCommandPrivate *d;
 
 public:
-    explicit QUndoCommand(QUndoCommand *parent = 0);
-    explicit QUndoCommand(const QString &text, QUndoCommand *parent = 0);
+    explicit QUndoCommand(QUndoCommand *parent = Q_NULLPTR);
+    explicit QUndoCommand(const QString &text, QUndoCommand *parent = Q_NULLPTR);
     virtual ~QUndoCommand();
 
     virtual void undo();
@@ -85,7 +85,7 @@ class Q_WIDGETS_EXPORT QUndoStack : public QObject
     Q_PROPERTY(int undoLimit READ undoLimit WRITE setUndoLimit)
 
 public:
-    explicit QUndoStack(QObject *parent = 0);
+    explicit QUndoStack(QObject *parent = Q_NULLPTR);
     ~QUndoStack();
     void clear();
 
diff --git a/src/widgets/util/qundoview.h b/src/widgets/util/qundoview.h
index a239d9b38e..2a15207ca5 100644
--- a/src/widgets/util/qundoview.h
+++ b/src/widgets/util/qundoview.h
@@ -55,10 +55,10 @@ class Q_WIDGETS_EXPORT QUndoView : public QListView
     Q_PROPERTY(QIcon cleanIcon READ cleanIcon WRITE setCleanIcon)
 
 public:
-    explicit QUndoView(QWidget *parent = 0);
-    explicit QUndoView(QUndoStack *stack, QWidget *parent = 0);
+    explicit QUndoView(QWidget *parent = Q_NULLPTR);
+    explicit QUndoView(QUndoStack *stack, QWidget *parent = Q_NULLPTR);
 #ifndef QT_NO_UNDOGROUP
-    explicit QUndoView(QUndoGroup *group, QWidget *parent = 0);
+    explicit QUndoView(QUndoGroup *group, QWidget *parent = Q_NULLPTR);
 #endif
     ~QUndoView();