diff --git a/src/vehicle.cpp b/src/vehicle.cpp
--- a/src/vehicle.cpp
+++ b/src/vehicle.cpp
@@ -219,7 +219,7 @@ bool Vehicle::NeedsServicing() const
 		if (replace_when_old && !v->NeedsAutorenewing(c, false)) continue;
 
 		/* Check refittability */
-		uint32 available_cargo_types, union_mask;
+		CargoTypes available_cargo_types, union_mask;
 		GetArticulatedRefitMasks(new_engine, true, &union_mask, &available_cargo_types);
 		/* Is there anything to refit? */
 		if (union_mask != 0) {