diff --git a/src/timetable_gui.cpp b/src/timetable_gui.cpp
--- a/src/timetable_gui.cpp
+++ b/src/timetable_gui.cpp
@@ -357,7 +357,7 @@ static const Widget _timetable_widgets[]
 static const WindowDesc _timetable_desc = {
 	WDP_AUTO, WDP_AUTO, 400, 130, 400, 130,
 	WC_VEHICLE_TIMETABLE, WC_VEHICLE_VIEW,
-	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_UNCLICK_BUTTONS | WDF_STICKY_BUTTON | WDF_RESIZABLE,
+	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_UNCLICK_BUTTONS | WDF_STICKY_BUTTON | WDF_RESIZABLE | WDF_CONSTRUCTION,
 	_timetable_widgets,
 };