diff --git a/gtk2_ardour/engine_dialog.cc b/gtk2_ardour/engine_dialog.cc
index a25c685d99..b87fb668e9 100644
--- a/gtk2_ardour/engine_dialog.cc
+++ b/gtk2_ardour/engine_dialog.cc
@@ -1104,6 +1104,7 @@ EngineControl::update_midi_options ()
 
 	if (midi_options.size() == 1) {
 		/* only contains the "none" option */
+		set_popdown_strings (midi_option_combo, midi_options);
 		midi_option_combo.set_sensitive (false);
 	} else {
 		if (_have_control) {