diff --git a/gtk2_ardour/route_ui.cc b/gtk2_ardour/route_ui.cc
index bbc60ef425..6a114b0e5f 100644
--- a/gtk2_ardour/route_ui.cc
+++ b/gtk2_ardour/route_ui.cc
@@ -61,7 +61,7 @@ using namespace ARDOUR;
 using namespace PBD;
 
 uint32_t RouteUI::_max_invert_buttons = 3;
-sigc::signal<void, boost::shared_ptr<Route> > RouteUI::BusSendDisplayChanged;
+PBD::Signal1<void, boost::shared_ptr<Route> > RouteUI::BusSendDisplayChanged;
 boost::weak_ptr<Route> RouteUI::_showing_sends_to;
 
 RouteUI::RouteUI (ARDOUR::Session* sess)
@@ -171,7 +171,7 @@ RouteUI::init ()
 	monitor_disk_button->signal_button_press_event().connect (sigc::mem_fun(*this, &RouteUI::monitor_disk_press));
 	monitor_disk_button->signal_button_release_event().connect (sigc::mem_fun(*this, &RouteUI::monitor_disk_release));
 
-	BusSendDisplayChanged.connect (sigc::mem_fun (*this, &RouteUI::bus_send_display_changed));
+	BusSendDisplayChanged.connect (*this, invalidator (*this), boost::bind(&RouteUI::bus_send_display_changed, this, _1), gui_context());
 }
 
 void
diff --git a/gtk2_ardour/route_ui.h b/gtk2_ardour/route_ui.h
index 0501c78937..245101f616 100644
--- a/gtk2_ardour/route_ui.h
+++ b/gtk2_ardour/route_ui.h
@@ -225,7 +225,7 @@ class RouteUI : public virtual AxisView
 	 *  by a click on the `Sends' button.  The parameter is the route that the sends are
 	 *  to, or 0 if no route is now in this mode.
 	 */
-	static sigc::signal<void, boost::shared_ptr<ARDOUR::Route> > BusSendDisplayChanged;
+	static PBD::Signal1<void, boost::shared_ptr<ARDOUR::Route> > BusSendDisplayChanged;
 
    protected:
 	PBD::ScopedConnectionList route_connections;