diff --git a/kubejs/startup_scripts/gtceu/machines.js b/kubejs/startup_scripts/gtceu/machines.js
index 4acaa8cee..36163c342 100644
--- a/kubejs/startup_scripts/gtceu/machines.js
+++ b/kubejs/startup_scripts/gtceu/machines.js
@@ -621,7 +621,7 @@ const registerGTCEuMachines = (event) => {
 			.where('X', Predicates.controller(Predicates.blocks(definition.get())))
 			.where('A', Predicates.blocks('tfg:casings/machine_casing_mars')
 				.or(Predicates.abilities(PartAbility.INPUT_ENERGY).setMinGlobalLimited(1).setMaxGlobalLimited(2)))
-			.where('B', Predicates.blocks('gtceu:high_temperature_smelting_casing'))
+			.where('B', Predicates.blocks('tfg:casings/machine_casing_ostrum_carbon'))
 			.where('C', Predicates.blocks('tfg:casings/machine_casing_vacuum_engine_intake'))
 			.where('D', Predicates.blocks('gtceu:heat_vent'))
 			.where('E', Predicates.blocks('tfg:casings/machine_casing_mars')
@@ -643,7 +643,7 @@ const registerGTCEuMachines = (event) => {
 			.aisle('A     AMA', 'A     AXA', 'AAAAAAAAA', '         ', '         ' )
 			.where('X', controller, Direction.SOUTH)
 			.where('A', Block.getBlock('tfg:casings/machine_casing_mars'))
-			.where('B', Block.getBlock('gtceu:high_temperature_smelting_casing'))
+			.where('B', Block.getBlock('tfg:casings/machine_casing_ostrum_carbon'))
 			.where('C', Block.getBlock('tfg:casings/machine_casing_vacuum_engine_intake'))
 			.where('D', Block.getBlock('gtceu:heat_vent'))
 			.where('E', GTMachines.FLUID_IMPORT_HATCH[GTValues.EV], Direction.SOUTH)