diff --git a/utils/playlist.h b/utils/playlist.h
index b50c34e..c304854 100644
--- a/utils/playlist.h
+++ b/utils/playlist.h
@@ -1,115 +1,115 @@
 /* AUDEX CDDA EXTRACTOR
  * Copyright (C) 2007-2015 Marco Nelles (audex@maniatek.com)
  * <http://userbase.kde.org/Audex>
  *
  * 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/>.
  */
 
 #ifndef PLAYLIST_HEADER
 #define PLAYLIST_HEADER
 
 #include <QString>
 #include <QStringList>
 #include <QDomDocument>
 #include <QTextStream>
 #include <QDir>
 #include <QFileInfo>
 
 #include <KLocalizedString>
 
 class PlaylistItem
 {
 
 public:
   PlaylistItem()
   {
     p_length = 0;
   }
   PlaylistItem(const PlaylistItem& other)
   {
     p_filename = other.p_filename;
     p_artist = other.p_artist;
     p_title = other.p_title;
     p_length = other.p_length;
   }
   PlaylistItem& operator=(const PlaylistItem& other)
   {
     p_filename = other.p_filename;
     p_artist = other.p_artist;
     p_title = other.p_title;
     p_length = other.p_length;
     return *this;
   }
   ~PlaylistItem() { }
 
-  bool operator==(const PlaylistItem& other)
+  bool const operator==(const PlaylistItem& other)
   {
     return (p_filename==other.p_filename && p_title==other.p_title && p_artist==other.p_artist && p_length==other.p_length);
   }
 
   void clear() { p_filename.clear(); p_artist.clear(); p_title.clear(); p_length = 0; }
 
   void setFilename(const QString& filename) { p_filename = filename; }
   const QString filename() { return p_filename; }
   void setArtist(const QString& artist) { p_artist = artist; }
   const QString artist() { return p_artist; }
   void setTitle(const QString& title) { p_title = title; }
   const QString title() { return p_title; }
   void setLength(const int length) { p_length = length; }
   int length() { return p_length; }
 
 private:
   QString p_filename;
   QString p_artist;
   QString p_title;
   int p_length; //sec
 
 };
 
 typedef QList<PlaylistItem> PlaylistItemList;
 
 class Playlist
 {
 
 public:
   Playlist();
   Playlist(const QByteArray& playlist);
   ~Playlist();
 
   void addPlaylist(const QByteArray& playlist);
 
   void clear();
 
   void appendItem(const PlaylistItem& item);
 
   //if playlistPath is set, then filename paths will be relative to playlistPath
   QByteArray toM3U(const QString& playlistPath = "", const bool utf8 = false) const;
   QByteArray toPLS(const QString& playlistPath = "", const bool utf8 = false) const;
   QByteArray toXSPF() const;
 
 private:
   PlaylistItemList p_playlist;
 
   //guess the playlist format: m3u, pls, xspf
   const QString p_playlist_format(const QByteArray& playlist);
 
   void p_add_M3U(const QByteArray& playlist);
   void p_add_PLS(const QByteArray& playlist);
   void p_add_XSPF(const QByteArray& playlist);
 
   const PlaylistItem p_parse_m3u_metadata_line(const QString& line);
 
 };
 
 #endif