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-rw-r--r--examples/opengl/paintedwindow/paintedwindow.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/examples/opengl/paintedwindow/paintedwindow.h b/examples/opengl/paintedwindow/paintedwindow.h
index 3fa781bf2c..11a76a3056 100644
--- a/examples/opengl/paintedwindow/paintedwindow.h
+++ b/examples/opengl/paintedwindow/paintedwindow.h
@@ -1,6 +1,9 @@
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+#ifndef PAINTEDWINDOW_H
+#define PAINTEDWINDOW_H
+
#include <QWindow>
#include <QtGui/qopengl.h>
@@ -55,3 +58,5 @@ private:
QPropertyAnimation *m_animation;
QTimer *m_paintTimer;
};
+
+#endif // PAINTEDWINDOW_H