3 files changed, 3 insertions, 3 deletions
diff --git a/examples/assistant/simpletextviewer/assistant.cpp b/examples/assistant/simpletextviewer/assistant.cpp
index b7bbe6a06..9e668bb7f 100644
--- a/examples/assistant/simpletextviewer/assistant.cpp
+++ b/examples/assistant/simpletextviewer/assistant.cpp
@@ -108,7 +108,7 @@ bool Assistant::startAssistant()
         proc->start(app, args);
 
         if (!proc->waitForStarted()) {
-            QMessageBox::critical(0, QObject::tr("Simple Text Viewer"),
+            QMessageBox::critical(nullptr, QObject::tr("Simple Text Viewer"),
                 QObject::tr("Unable to launch Qt Assistant (%1)").arg(app));
             return false;
         }
diff --git a/examples/assistant/simpletextviewer/findfiledialog.h b/examples/assistant/simpletextviewer/findfiledialog.h
index bc0e22409..6ca57b061 100644
--- a/examples/assistant/simpletextviewer/findfiledialog.h
+++ b/examples/assistant/simpletextviewer/findfiledialog.h
@@ -76,7 +76,7 @@ public:
 private slots:
     void browse();
     void help();
-    void openFile(QTreeWidgetItem *item = 0);
+    void openFile(QTreeWidgetItem *item = nullptr);
     void update();
 
 private:
diff --git a/examples/assistant/simpletextviewer/textedit.h b/examples/assistant/simpletextviewer/textedit.h
index d44fbb5f5..b1cb243fb 100644
--- a/examples/assistant/simpletextviewer/textedit.h
+++ b/examples/assistant/simpletextviewer/textedit.h
@@ -59,7 +59,7 @@ class TextEdit : public QTextEdit
     Q_OBJECT
 
 public:
-    TextEdit(QWidget *parent = 0);
+    TextEdit(QWidget *parent = nullptr);
     void setContents(const QString &fileName);
 
 private: