diff --git a/src/mame/drivers/galaxian.c b/src/mame/drivers/galaxian.c
index 8c52f0b0538..2e705f98548 100644
--- a/src/mame/drivers/galaxian.c
+++ b/src/mame/drivers/galaxian.c
@@ -9914,7 +9914,7 @@ ROM_START( atlantis2 )
 	ROM_LOAD( "boa_8.2p",     0x3800, 0x0800, CRC(d2c5c984) SHA1(a9432f9aff8a2f5ca1d347443efc008a177d8ae0) )
 
 	ROM_REGION( 0x10000, "audiocpu", 0 )
-	ROM_LOAD( "boa_11.5c",    0x0000, 0x0800, CRC(bcd297f0) SHA1(8ed78487d76fd0a917ab7b258937a46e2cd9800c) )
+	ROM_LOAD( "boa_11.5c",    0x0000, 0x0800, CRC(be037cf6) SHA1(f28e5ead496e70beaada24775aa58bd5d75f2d25) )
 	ROM_LOAD( "boa_12.5d",    0x0800, 0x0800, CRC(de7912da) SHA1(8558b4eff5d7e63029b325edef9914feda5834c3) )
 	ROM_LOAD( "boa_13.5e",    0x1000, 0x0800, CRC(ba2fa933) SHA1(1f976d8595706730e29f93027e7ab4620075c078) )