- _connections.push_back ((*i)->Changed.connect (boost::bind (&ContentWidget::model_changed, this, _2)));
+#if BOOST_VERSION >= 106100
+ _connections.push_back ((*i)->Change.connect (boost::bind (&ContentWidget::model_changed, this, boost::placeholders::_1, boost::placeholders::_3)));
+#else
+ _connections.push_back ((*i)->Change.connect (boost::bind (&ContentWidget::model_changed, this, _1, _3)));
+#endif