diff --git a/gtk2_ardour/trigger_ui.cc b/gtk2_ardour/trigger_ui.cc
index 7772d0720d..5e47a342c8 100644
--- a/gtk2_ardour/trigger_ui.cc
+++ b/gtk2_ardour/trigger_ui.cc
@@ -106,9 +106,9 @@ TriggerUI::TriggerUI (Item* parent, Trigger& t)
 	const double scale = UIConfiguration::instance().get_ui_scale();
 	const Distance spacing = 12. * scale;
 
-	attach (follow_action_button, { 0, 0 }, { 2, 1 }, PackExpand, PackExpand, { 10 });
-	attach (follow_left, { 0, 1 }, { 1, 2 }, PackExpand, PackExpand, { 10 });
-	attach (follow_right, { 1, 1 }, { 2, 2 }, PackExpand, PackExpand, { 10 });
+	attach (follow_action_button, 0, 0, 2, 1, PackExpand, PackExpand, { 10 });
+	attach (follow_left, 0, 1, 1, 2,  PackExpand, PackExpand, { 10 });
+	attach (follow_right, 1, 1, 2, 2,  PackExpand, PackExpand, { 10 });
 
 	trigger_changed ();
 }