diff --git a/src/mame/drivers/hikaru.c b/src/mame/drivers/hikaru.c
index f11643a5096..13fb5254c9a 100644
--- a/src/mame/drivers/hikaru.c
+++ b/src/mame/drivers/hikaru.c
@@ -455,9 +455,12 @@ MACHINE_CONFIG_END
 	ROM_LOAD16_WORD_SWAP_BIOS( 0, "epr23400a.ic94",   0x000000, 0x200000, CRC(2aa906a7) SHA1(098c9909b123ed6c338ac874f2ee90e3b2da4c02) ) \
 	ROM_SYSTEM_BIOS( 1, "bios1", "epr23400" ) \
 	ROM_LOAD16_WORD_SWAP_BIOS( 1, "epr-23400.ic94",   0x000000, 0x200000, CRC(3d557104) SHA1(d39879f5a1acbd54ad8ee4fbd412f870c9ff4aa5) ) \
+	ROM_SYSTEM_BIOS( 2, "bios2", "epr21904" ) \
+	ROM_LOAD16_WORD_SWAP_BIOS( 1, "epr-21904.ic94",   0x000000, 0x200000, CRC(d96298b6) SHA1(d10d837bc7d68eb7125c34beffe21a91305627b0) ) \
 
 // bios 0 is SAMURAI boot rom 0.96 / 2000/8/10
 // bios 1 is SAMURAI boot rom 0.92 / 1999/7/2
+// bios 2 is SAMURAI boot rom 0.84 / 1999/7/22
 
 
 ROM_START( hikaru )