diff --git a/gtk2_ardour/route_ui.cc b/gtk2_ardour/route_ui.cc
index 55e2ad1414..02ceda33a0 100644
--- a/gtk2_ardour/route_ui.cc
+++ b/gtk2_ardour/route_ui.cc
@@ -132,6 +132,7 @@ RouteUI::RouteUI (ARDOUR::Session* sess)
 	, _comment_window(0)
 	, _comment_area(0)
 	, _invert_menu(0)
+	, _playlist_selector(0)
 {
 	if (program_port_prefix.empty()) {
 		// compare to gtk2_ardour/port_group.cc