diff --git a/ship_gui.c b/ship_gui.c
--- a/ship_gui.c
+++ b/ship_gui.c
@@ -203,7 +203,7 @@ static const Widget _ship_details_widget
 };
 
 static const WindowDesc _ship_details_desc = {
-	-1,-1, 405, 101,
+	WDP_AUTO, WDP_AUTO, 405, 101,
 	WC_VEHICLE_DETAILS,WC_VEHICLE_VIEW,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_UNCLICK_BUTTONS,
 	_ship_details_widgets,
@@ -345,7 +345,7 @@ static const Widget _new_ship_widgets[] 
 };
 
 static const WindowDesc _new_ship_desc = {
-	-1, -1, 255, 214,
+	WDP_AUTO, WDP_AUTO, 255, 214,
 	WC_BUILD_VEHICLE,0,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_UNCLICK_BUTTONS | WDF_RESIZABLE,
 	_new_ship_widgets,
@@ -515,7 +515,7 @@ static const Widget _ship_view_widgets[]
 };
 
 static const WindowDesc _ship_view_desc = {
-	-1,-1, 250, 116,
+	WDP_AUTO, WDP_AUTO, 250, 116,
 	WC_VEHICLE_VIEW,0,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_UNCLICK_BUTTONS | WDF_STICKY_BUTTON | WDF_RESIZABLE,
 	_ship_view_widgets,