--- a/tools/designer/src/plugins/widgets/q3listbox/q3listbox_plugin.h	Fri Feb 19 23:40:16 2010 +0200
+++ b/tools/designer/src/plugins/widgets/q3listbox/q3listbox_plugin.h	Fri Mar 12 15:46:37 2010 +0200
@@ -51,7 +51,7 @@
     Q_OBJECT
     Q_INTERFACES(QDesignerCustomWidgetInterface)
 public:
-    Q3ListBoxPlugin(const QIcon &icon, QObject *parent = 0);
+    explicit Q3ListBoxPlugin(const QIcon &icon, QObject *parent = 0);
 
     virtual QString name() const;
     virtual QString group() const;