diff --git a/src/mame/drivers/ksys573.c b/src/mame/drivers/ksys573.c
index 2bf4a273ec7..4419f94c861 100644
--- a/src/mame/drivers/ksys573.c
+++ b/src/mame/drivers/ksys573.c
@@ -5177,7 +5177,7 @@ ROM_START( hyperbb )
 	ROM_LOAD( "876ea.27h",    0x000000, 0x200000, CRC(49175f99) SHA1(0154f6332ed210b6f0af20ba622133cde0994b7f) )
 
 	ROM_REGION( 0x002000, "m48t58", 0 ) /* timekeeper */
-	ROM_LOAD( "876ea.22h",    0x000000, 0x002000, CRC(525ecaee) SHA1(f978c4fc614e8a594e97a3ddc7a2a006b7e2b797) )
+	ROM_LOAD( "876ea.22h",    0x000000, 0x002000, CRC(8e11d196) SHA1(e7442fdd611f4290d531b1ebdc9f487e323fd531) )
 ROM_END
 
 ROM_START( hyperbbc )