--- a/tools/assistant/lib/qhelpenginecore.h	Fri Sep 17 08:34:18 2010 +0300
+++ b/tools/assistant/lib/qhelpenginecore.h	Mon Oct 04 01:19:32 2010 +0300
@@ -65,7 +65,7 @@
     Q_PROPERTY(QString currentFilter READ currentFilter WRITE setCurrentFilter)
     
 public:
-    QHelpEngineCore(const QString &collectionFile, QObject *parent = 0);
+    explicit QHelpEngineCore(const QString &collectionFile, QObject *parent = 0);
     virtual ~QHelpEngineCore();
 
     bool setupData();