diff --git a/src/mame/drivers/segas16b.c b/src/mame/drivers/segas16b.c
index 38086b22ea6..79ffc87edf6 100644
--- a/src/mame/drivers/segas16b.c
+++ b/src/mame/drivers/segas16b.c
@@ -3380,7 +3380,7 @@ ROM_START( aceattac )
 
 	ROM_REGION( 0x2000, "maincpu:key", 0 ) // decryption key
 	// reconstructed key; some of the RNG-independent bits could be incorrect
-	ROM_LOAD( "317-0059.key", 0x0000, 0x2000, BAD_DUMP CRC(14ce2a94) SHA1(bbf206311ac744c2b4845b33095c5a9bf8fe2014) )
+	ROM_LOAD( "317-0059.key", 0x0000, 0x2000, BAD_DUMP CRC(4512e2fa) SHA1(c703fb482f846fb1a3bdba738b125221dc52bf22) )
 
 	ROM_REGION( 0x30000, "gfx1", 0 ) // tiles
 	ROM_LOAD( "epr-11493.b9",  0x00000, 0x10000, CRC(654485d9) SHA1(b431270564c4e33fd70c8c85af1fcbff8b59ba49) )