diff --git a/src/gui/scanprogressdialog.cpp b/src/gui/scanprogressdialog.cpp
index da673f4..b14049e 100644
--- a/src/gui/scanprogressdialog.cpp
+++ b/src/gui/scanprogressdialog.cpp
@@ -1,46 +1,53 @@
 /*************************************************************************
  *  Copyright (C) 2010 by Volker Lanz <vl@fidra.de>                      *
  *  Copyright (C) 2016 by Andrius Štikonas <andrius@stikonas.eu>         *
  *                                                                       *
  *  This program is free software; you can redistribute it and/or        *
  *  modify it under the terms of the GNU General Public License as       *
  *  published by the Free Software Foundation; either version 3 of       *
  *  the License, or (at your option) any later version.                  *
  *                                                                       *
  *  This program is distributed in the hope that it will be useful,      *
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of       *
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
  *  GNU General Public License for more details.                         *
  *                                                                       *
  *  You should have received a copy of the GNU General Public License    *
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.*
  *************************************************************************/
 
 #include "gui/scanprogressdialog.h"
 
+#include <QCloseEvent>
+
 #include <KLocalizedString>
 
 ScanProgressDialog::ScanProgressDialog(QWidget* parent) :
     QProgressDialog(parent)
 {
     setWindowTitle(xi18nc("@title:window", "Scanning devices..."));
     setMinimumWidth(280);
     setMinimumDuration(150);
     setValue(0);
     setAttribute(Qt::WA_ShowModal, true);
 }
 
+void ScanProgressDialog::closeEvent(QCloseEvent* e)
+{
+    e->ignore();
+}
+
 void ScanProgressDialog::setDeviceName(const QString& d)
 {
     if (d.isEmpty())
         setLabelText(xi18nc("@label", "Scanning..."));
     else
         setLabelText(xi18nc("@label", "Scanning device: <filename>%1</filename>", d));
 }
 
 void ScanProgressDialog::showEvent(QShowEvent* e)
 {
-    setCancelButton(0);
+    setCancelButton(nullptr);
 
     QProgressDialog::showEvent(e);
 }
diff --git a/src/gui/scanprogressdialog.h b/src/gui/scanprogressdialog.h
index c3bbb93..327828d 100644
--- a/src/gui/scanprogressdialog.h
+++ b/src/gui/scanprogressdialog.h
@@ -1,42 +1,42 @@
 /*************************************************************************
  *  Copyright (C) 2010 by Volker Lanz <vl@fidra.de>                      *
  *                                                                       *
  *  This program is free software; you can redistribute it and/or        *
  *  modify it under the terms of the GNU General Public License as       *
  *  published by the Free Software Foundation; either version 3 of       *
  *  the License, or (at your option) any later version.                  *
  *                                                                       *
  *  This program is distributed in the hope that it will be useful,      *
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of       *
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
  *  GNU General Public License for more details.                         *
  *                                                                       *
  *  You should have received a copy of the GNU General Public License    *
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.*
  *************************************************************************/
 
-#if !defined(SCANPROGRESSDIALOG_H)
-
+#ifndef SCANPROGRESSDIALOG_H
 #define SCANPROGRESSDIALOG_H
 
 #include <QProgressDialog>
 
 class QShowEvent;
 
 class ScanProgressDialog : public QProgressDialog
 {
 public:
     ScanProgressDialog(QWidget* parent);
 
     void setProgress(int p) {
         setValue(p);
     }
     void setDeviceName(const QString& d);
 
 protected:
+    void closeEvent(QCloseEvent* e) override;
     void showEvent(QShowEvent* e) override;
 
 };
 
 #endif