diff --git a/src/mame/drivers/megatech.c b/src/mame/drivers/megatech.c
index be318599c45..2352c41dfaa 100644
--- a/src/mame/drivers/megatech.c
+++ b/src/mame/drivers/megatech.c
@@ -616,9 +616,9 @@ MACHINE_CONFIG_END
 	ROM_REGION( 0x400000, "maincpu", ROMREGION_ERASEFF ) \
 	ROM_REGION( 0x10000, "mtbios", 0 ) \
 	ROM_SYSTEM_BIOS( 0, "rev0", "Rev 0" ) \
-	ROM_LOAD( "epr12664.20", 0x000000, 0x8000, CRC(f71e9526) SHA1(1c7887541d02c41426992d17f8e3db9e03975953) ) \
+	ROMX_LOAD( "epr12664.20", 0x000000, 0x8000, CRC(f71e9526) SHA1(1c7887541d02c41426992d17f8e3db9e03975953), ROM_BIOS(1)) \
 	ROM_SYSTEM_BIOS( 1, "reva", "Rev A" ) \
-	ROM_LOAD( "epr-12263a.20", 0x000000, 0x8000, CRC(07c3f423) SHA1(50c28bbc2d4349c820d988ae3f20aae3f808545f) ) \
+	ROMX_LOAD( "epr-12263a.20", 0x000000, 0x8000, CRC(07c3f423) SHA1(50c28bbc2d4349c820d988ae3f20aae3f808545f), ROM_BIOS(2)) \
 
 /* no games */
 ROM_START( megatech )