diff --git a/src/klineedit_p.h b/src/klineedit_p.h
index af95d76..d4b9243 100644
--- a/src/klineedit_p.h
+++ b/src/klineedit_p.h
@@ -1,115 +1,115 @@
 /* This file is part of the KDE libraries
 
    Copyright (C) 2007 Aaron Seigo <aseigo@kde.org>
 
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License (LGPL) as published by the Free Software Foundation;
    either version 2 of the License, or (at your option) any later
    version.
 
    This library 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
    Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
 */
 
 #ifndef KLINEEDIT_P_H
 #define KLINEEDIT_P_H
 
 #include "klineedit.h"
 
 #include <QApplication>
 #include <QPainter>
 #include <QPaintEvent>
 #include <QPropertyAnimation>
 #include <QIcon>
 
 class KCompletionBox;
 class LineEditUrlDropEventFilter;
 
 class KLineEditPrivate
 {
 public:
     explicit KLineEditPrivate(KLineEdit *parent)
         : q_ptr(parent) {}
 
     ~KLineEditPrivate();
 
     void _k_textChanged(const QString &text);
     void _k_completionMenuActivated(QAction *act);
     void _k_tripleClickTimeout();  // resets possibleTripleClick
     void _k_restoreSelectionColors();
     void _k_completionBoxTextChanged(const QString &text);
 
     void updateUserText(const QString &text);
 
     /**
      * Checks whether we should/should not consume a key used as a shortcut.
      * This makes it possible to handle shortcuts in the focused widget before any
      * window-global QAction is triggered.
      */
     bool overrideShortcut(const QKeyEvent *e);
 
     void init();
 
     bool copySqueezedText(bool copy) const;
 
     /**
      * Properly sets the squeezed text whenever the widget is
      * created or resized.
      */
     void setSqueezedText();
 
     QMap<KCompletion::CompletionMode, bool> disableCompletionMap;
 
     QColor previousHighlightColor;
     QColor previousHighlightedTextColor;
 
     QPalette::ColorRole bgRole;
 
     QString squeezedText;
     QString userText;
     QString lastStyleClass;
 
     KCompletionBox *completionBox;
 
     LineEditUrlDropEventFilter *urlDropEventFilter;
 
     QAction *noCompletionAction;
     QAction *shellCompletionAction;
     QAction *autoCompletionAction;
     QAction *popupCompletionAction;
     QAction *shortAutoCompletionAction;
     QAction *popupAutoCompletionAction;
     QAction *defaultAction;
 
-    KLineEdit *q_ptr;
+    KLineEdit * const q_ptr;
 
     int squeezedEnd;
     int squeezedStart;
 
     static bool s_initialized;
     static bool s_backspacePerformsCompletion; // Configuration option
 
     bool userSelection: 1;
     bool autoSuggest : 1;
     bool disableRestoreSelection: 1;
     bool handleURLDrops: 1;
     bool trapReturnKeyEvents: 1;
     bool enableSqueezedText: 1;
     bool completionRunning: 1;
     bool italicizePlaceholder: 1;
     bool threeStars: 1;
     bool possibleTripleClick : 1; // set in mousePressEvent, deleted in tripleClickTimeout
     Q_DECLARE_PUBLIC(KLineEdit)
 };
 
 
 #endif