diff --git a/src/build_vehicle_gui.cpp b/src/build_vehicle_gui.cpp
--- a/src/build_vehicle_gui.cpp
+++ b/src/build_vehicle_gui.cpp
@@ -524,7 +524,7 @@ const StringID _engine_sort_listing[][12
 static bool CDECL CargoFilter(const EngineID *eid, const CargoID cid)
 {
 	if (cid == CF_ANY) return true;
-	uint32 refit_mask = GetUnionOfArticulatedRefitMasks(*eid, true) & _standard_cargo_mask;
+	CargoTypes refit_mask = GetUnionOfArticulatedRefitMasks(*eid, true) & _standard_cargo_mask;
 	return (cid == CF_NONE ? refit_mask == 0 : HasBit(refit_mask, cid));
 }
 
@@ -535,7 +535,7 @@ static GUIEngineList::FilterFunction * c
 static int DrawCargoCapacityInfo(int left, int right, int y, EngineID engine)
 {
 	CargoArray cap;
-	uint32 refits;
+	CargoTypes refits;
 	GetArticulatedVehicleCargoesAndRefits(engine, &cap, &refits);
 
 	for (CargoID c = 0; c < NUM_CARGO; c++) {