diff --git a/gtk2_ardour/wscript b/gtk2_ardour/wscript
index f62d5ead8b..291c31d75c 100644
--- a/gtk2_ardour/wscript
+++ b/gtk2_ardour/wscript
@@ -257,6 +257,7 @@ gtk2_ardour_sources = [
         'region_list_base.cc',
         'region_peak_cursor.cc',
         'region_selection.cc',
+        'region_ui_settings.cc',
         'region_view.cc',
         'return_ui.cc',
         'rhythm_ferret.cc',