diff --git a/interfaces/KoID.h b/interfaces/KoID.h
index 267fb0bd15..18d233ec38 100644
--- a/interfaces/KoID.h
+++ b/interfaces/KoID.h
@@ -1,136 +1,145 @@
 /* This file is part of the KDE project
  * Copyright (C) 2006 Thomas Zander <zander@kde.org>
  * Copyright (c) 2004 Cyrille Berger <cberger@cberger.net>
  * Copyright (c) 2006 Boudewijn Rempt <boud@valdyas.org>
  *
  * This library 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; 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
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library 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 _KO_ID_H_
 #define _KO_ID_H_
 
 #include <QString>
 #include <QMetaType>
 #include <QDebug>
 
 #include <klocalizedstring.h>
 
 /**
  * A KoID is a combination of a user-visible string and a string that uniquely
  * identifies a given resource across languages.
  */
 class KoID
 {
 public:
     KoID()
         : m_id()
         , m_name()
     {}
 
     /**
      * Construct a KoID with the given id, and name, id is the untranslated
      * official name of the id, name should be translatable as it will be used
      * in the UI.
      *
      * @code
      * KoID("id", i18n("name"))
      * @endcode
      */
     explicit KoID(const QString &id, const QString &name = QString())
         : m_id(id)
         , m_name(name)
     {}
 
     /**
      * Use this constructore for static KoID. as KoID("id", ki18n("name"));
      * the name will be translated the first time it is needed. This is
      * important because static objects are constructed before translations
      * are initialized.
      */
     explicit KoID(const QString &id, const KLocalizedString &name)
         : m_id(id)
         , m_localizedString(name)
     {}
 
     KoID(const KoID &rhs)
     {
         m_id = rhs.m_id;
         m_name = rhs.name();
     }
 
+    KoID &operator=(const KoID &rhs)
+    {
+        if (this != &rhs) {
+            m_id = rhs.m_id;
+            m_name = rhs.name();
+        }
+        return *this;
+    }
+
     QString id() const
     {
         return m_id;
     }
 
     QString name() const
     {
         if (m_name.isEmpty() && !m_localizedString.isEmpty()) {
             m_name = m_localizedString.toString();
         }
         return m_name;
     }
 
     friend inline bool operator==(const KoID &, const KoID &);
     friend inline bool operator!=(const KoID &, const KoID &);
     friend inline bool operator<(const KoID &, const KoID &);
     friend inline bool operator>(const KoID &, const KoID &);
 
     static bool compareNames(const KoID &id1, const KoID &id2)
     {
         return id1.name() < id2.name();
     }
 
 
 
 private:
 
     QString m_id;
     mutable QString m_name;
     KLocalizedString m_localizedString;
 
 };
 
 Q_DECLARE_METATYPE(KoID)
 
 inline bool operator==(const KoID &v1, const KoID &v2)
 {
     return v1.m_id == v2.m_id;
 }
 
 inline bool operator!=(const KoID &v1, const KoID &v2)
 {
     return v1.m_id != v2.m_id;
 }
 
 inline bool operator<(const KoID &v1, const KoID &v2)
 {
     return v1.m_id < v2.m_id;
 }
 
 inline bool operator>(const KoID &v1, const KoID &v2)
 {
     return v1.m_id > v2.m_id;
 }
 
 inline QDebug operator<<(QDebug dbg, const KoID &id)
 {
     dbg.nospace() << id.name() << " (" << id.id() << " )";
 
     return dbg.space();
 }
 
 #endif