diff --git a/src/saveload/oldloader_sl.cpp b/src/saveload/oldloader_sl.cpp
--- a/src/saveload/oldloader_sl.cpp
+++ b/src/saveload/oldloader_sl.cpp
@@ -384,11 +384,13 @@ static bool FixTTOEngines()
 	}
 
 	/* Load the default engine set. Many of them will be overridden later */
-	uint j = 0;
-	for (uint i = 0; i < lengthof(_orig_rail_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_TRAIN, i);
-	for (uint i = 0; i < lengthof(_orig_road_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_ROAD, i);
-	for (uint i = 0; i < lengthof(_orig_ship_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_SHIP, i);
-	for (uint i = 0; i < lengthof(_orig_aircraft_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_AIRCRAFT, i);
+	{
+		uint j = 0;
+		for (uint i = 0; i < lengthof(_orig_rail_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_TRAIN, i);
+		for (uint i = 0; i < lengthof(_orig_road_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_ROAD, i);
+		for (uint i = 0; i < lengthof(_orig_ship_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_SHIP, i);
+		for (uint i = 0; i < lengthof(_orig_aircraft_vehicle_info); i++, j++) new (GetTempDataEngine(j)) Engine(VEH_AIRCRAFT, i);
+	}
 
 	Date aging_date = std::min(_date + DAYS_TILL_ORIGINAL_BASE_YEAR, ConvertYMDToDate(2050, 0, 1));