diff --git a/libdialogutil/imagefilter.cpp b/libdialogutil/imagefilter.cpp
index 8cf0076..ca32752 100644
--- a/libdialogutil/imagefilter.cpp
+++ b/libdialogutil/imagefilter.cpp
@@ -1,121 +1,121 @@
 /************************************************************************
  *									*
  *  This file is part of Kooka, a scanning/OCR application using	*
  *  Qt <http://www.qt.io> and KDE Frameworks <http://www.kde.org>.	*
  *									*
  *  Copyright (C) 2016 Jonathan Marten <jjm@keelhaul.me.uk>		*
  *									*
  *  Kooka is free software; you can redistribute it and/or modify it	*
  *  under the terms of the GNU Library General Public License as	*
  *  published by the Free Software Foundation and appearing in the	*
  *  file COPYING included in the packaging of this file;  either	*
  *  version 2 of the License, or (at your option) any later version.	*
  *									*
  *  As a special exception, permission is given to link this program	*
  *  with any version of the KADMOS OCR/ICR engine (a product of		*
  *  reRecognition GmbH, Kreuzlingen), and distribute the resulting	*
  *  executable without including the source code for KADMOS in the	*
  *  source distribution.						*
  *									*
  *  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;  see the file COPYING.  If		*
  *  not, see <http://www.gnu.org/licenses/>.				*
  *									*
  ************************************************************************/
 
 #include "imagefilter.h"
 
 #include <qdebug.h>
 #include <qimagereader.h>
 #include <qimagewriter.h>
 #include <qmimedatabase.h>
 #include <qmimetype.h>
 
 #include <klocalizedstring.h>
 
 
 static bool commentLessThan(const QString &s1, const QString &s2)
 {
     const int idx1 = s1.indexOf('|');
     const int idx2 = s2.indexOf('|');
     return (s1.mid(idx1+1).toLower()<s2.mid(idx2+1).toLower());
 }
 
 
 static QStringList filterList(ImageFilter::FilterMode mode, ImageFilter::FilterOptions options, bool kdeFormat)
 {
     QStringList list;
     QStringList allPatterns;
 
     QList<QByteArray> mimeTypes;
     if (mode==ImageFilter::Writing) mimeTypes = QImageWriter::supportedMimeTypes();
     else mimeTypes = QImageReader::supportedMimeTypes();
 
     QMimeDatabase db;
 
     foreach (const QByteArray &mimeType, mimeTypes)
     {
         QMimeType mime = db.mimeTypeForName(mimeType);
         if (!mime.isValid()) continue;
 
         QStringList pats = mime.globPatterns();
         list.append(pats.join(' ')+'|'+mime.comment());
         if (options & ImageFilter::AllImages) allPatterns.append(pats);
     }
 
     if (!(options & ImageFilter::Unsorted))		// unless list wanted unsorted,
     {							// sort by the mime type comment
-        qSort(list.begin(), list.end(), commentLessThan);
+        std::sort(list.begin(), list.end(), commentLessThan);
     }
 
     if (!kdeFormat)
     {
         // We generated a KDE format filter above (for ease of sorting),
         // so if we want a Qt format filter then it needs to be rearranged.
         for (QStringList::iterator it = list.begin(); it!=list.end(); ++it)
         {
             QString &filter = (*it);			// modifying list in place
             int idx = filter.indexOf('|');
             if (idx==-1) continue;
             filter = filter.mid(idx+1)+" ("+filter.left(idx)+')';
             (*it) = filter;
         }
     }
 
     if (!allPatterns.isEmpty())				// want an "All Images" entry
     {
         if (kdeFormat) list.prepend(i18n("%1|All Image Files", allPatterns.join(' ')));
         else list.prepend(i18n("All Image Files (%1)", allPatterns.join(' ')));
     }
 
     if (options & ImageFilter::AllFiles)		// want an "All Files" entry
     {
         if (kdeFormat) list.append(i18n("*|All Files"));
         else list.append(i18n("All Files (*)"));
     }
 
     return (list);
 }
 
 
 QString ImageFilter::qtFilterString(ImageFilter::FilterMode mode, ImageFilter::FilterOptions options)
 {
     return (qtFilterList(mode, options).join(";;"));
 }
 
 
 QStringList ImageFilter::qtFilterList(ImageFilter::FilterMode mode, ImageFilter::FilterOptions options)
 {
     return (filterList(mode, options, false));
 }
 
 
 QString ImageFilter::kdeFilter(ImageFilter::FilterMode mode, ImageFilter::FilterOptions options)
 {
     return (filterList(mode, options, true).join('\n'));
 }