diff --git a/roadveh_gui.c b/roadveh_gui.c
--- a/roadveh_gui.c
+++ b/roadveh_gui.c
@@ -219,9 +219,8 @@ static void ShowRoadVehDetailsWindow(con
 
 	DeleteWindowById(WC_VEHICLE_ORDERS, veh);
 	DeleteWindowById(WC_VEHICLE_DETAILS, veh);
-	_alloc_wnd_parent_num = veh;
-	w = AllocateWindowDesc(&_roadveh_details_desc);
-	w->window_number = veh;
+
+	w = AllocateWindowDescFront(&_roadveh_details_desc, veh);
 	w->caption_color = v->owner;
 }