diff --git a/components/rtgui/SConscript b/components/rtgui/SConscript
index 7ff9dd3137a26fa6b52561b8cb86d2d1e6631d13..68ec40cf214064e8a6618feae5be5960902c8a14 100644
--- a/components/rtgui/SConscript
+++ b/components/rtgui/SConscript
@@ -45,6 +45,7 @@ widgets/radiobox.c
 widgets/slider.c
 widgets/staticline.c
 widgets/textbox.c
+widgets/listbox.c
 widgets/title.c
 widgets/toplevel.c
 widgets/view.c