diff --git a/gtk2_ardour/triggerbox_ui.cc b/gtk2_ardour/triggerbox_ui.cc
index 07a178750d..229d46cf35 100644
--- a/gtk2_ardour/triggerbox_ui.cc
+++ b/gtk2_ardour/triggerbox_ui.cc
@@ -125,6 +125,7 @@ TriggerBoxUI::TriggerBoxUI (ArdourCanvas::Item* parent, TriggerBox& tb)
 	: Box (parent, Box::Vertical)
 	, _triggerbox (tb)
 	, file_chooser (0)
+	, _context_menu (0)
 {
 	set_homogenous (true);
 	set_spacing (16);