diff --git a/akonadi/resourcesynchronizationjob.h b/akonadi/resourcesynchronizationjob.h
index cf1d23d58..1d50e0552 100644
--- a/akonadi/resourcesynchronizationjob.h
+++ b/akonadi/resourcesynchronizationjob.h
@@ -1,90 +1,90 @@
 /*
  * Copyright (c) 2009 Volker Krause <vkrause@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 as published by the Free Software Foundation; either
  * version 2.1 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.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #ifndef AKONADI_RESOURCESYNCHRONIZATIONJOB_H
 #define AKONADI_RESOURCESYNCHRONIZATIONJOB_H
 
 #include "akonadi_export.h"
 
 #include <kjob.h>
 
 namespace Akonadi {
 
 class AgentInstance;
 class ResourceSynchronizationJobPrivate;
 
 /**
  * @short Job that synchronizes a resource.
  *
  * This job will trigger a resource to synchronize the backend it is
  * responsible for (e.g. a local file or a groupware server) with the
  * Akonadi storage.
  *
  * If you only want to trigger the synchronization without being
  * interested in the result, using Akonadi::AgentInstance::synchronize() is enough.
  * If you want to wait until it's finished, use this class.
  *
  * Example:
  *
  * @code
  * using namespace Akonadi;
  *
  * const AgentInstance resource = AgentManager::self()->instance( "myresourceidentifier" );
  *
  * ResourceSynchronizationJob *job = new ResourceSynchronizationJob( resource );
  * connect( job, SIGNAL( result( KJob* ) ), SLOT( synchronizationFinished( KJob* ) ) );
  *
  * @endcode
  *
  * @note This is a KJob not an Akonadi::Job, so it wont auto-start!
  *
  * @author Volker Krause <vkrause@kde.org>
  * @since 4.4
  */
 class AKONADI_EXPORT ResourceSynchronizationJob : public KJob
 {
   Q_OBJECT
 
   public:
     /**
      * Creates a new synchronization job for the given resource.
      *
      * @param instance The resource instance to synchronize.
      */
-    ResourceSynchronizationJob( const AgentInstance &instance, QObject *parent = 0 );
+    explicit ResourceSynchronizationJob( const AgentInstance &instance, QObject *parent = 0 );
 
     /**
      * Destroys the synchronization job.
      */
     ~ResourceSynchronizationJob();
 
     /* reimpl */
     void start();
 
   private:
     //@cond PRIVATE
     ResourceSynchronizationJobPrivate* const d;
     friend class ResourceSynchronizationJobPrivate;
 
     Q_PRIVATE_SLOT( d, void slotSynchronized() )
     Q_PRIVATE_SLOT( d, void slotTimeout() )
     //@endcond
 };
 
 }
 
 #endif