diff --git a/gtk2_ardour/mixer_strip.h b/gtk2_ardour/mixer_strip.h
index 883bfffdba..a619a78f04 100644
--- a/gtk2_ardour/mixer_strip.h
+++ b/gtk2_ardour/mixer_strip.h
@@ -173,6 +173,10 @@ class MixerStrip : public RouteUI, public Gtk::EventBox
 	Gtk::Table top_button_table;
 	Gtk::Table middle_button_table;
 	Gtk::Table bottom_button_table;
+	Gtk::Table auto_n_io_table;
+    
+    Gtk::Label automation_label;
+    Gtk::Label io_label;
 
 	ArdourButton                 meter_point_button;