diff --git a/src/mame/drivers/segas16b.c b/src/mame/drivers/segas16b.c
index be555a4132a..097853e5a12 100644
--- a/src/mame/drivers/segas16b.c
+++ b/src/mame/drivers/segas16b.c
@@ -5857,8 +5857,8 @@ ROM_START( tetris2 )
 	ROM_LOAD( "epr-12167.b11", 0x20000, 0x10000, CRC(2495fd4e) SHA1(2db94ead9223a67238a97e724668076fc43e5534) )
 
 	ROM_REGION16_BE( 0x020000, "sprites", 0 ) // sprites
-	ROM_LOAD16_BYTE( "epr-12194.b1", 0x00001, 0x10000, CRC(2fb38880) SHA1(0e1b601bbda78d1887951c1f7e752531c281bc83) )
-	ROM_LOAD16_BYTE( "epr-12195.b5", 0x00000, 0x10000, CRC(d6a02cba) SHA1(d80000f92e754e89c6ca7b7273feab448fc9a061) )
+	ROM_LOAD16_BYTE( "epr-12194.b1", 0x00001, 0x10000, CRC(2fb38880) SHA1(0e1b601bbda78d1887951c1f7e752531c281bc83) ) // 28 pin Fujitsu MB831000 MASK rom
+	ROM_LOAD16_BYTE( "epr-12195.b5", 0x00000, 0x10000, CRC(d6a02cba) SHA1(d80000f92e754e89c6ca7b7273feab448fc9a061) ) // 28 pin Fujitsu MB831000 MASK rom
 
 	ROM_REGION( 0x10000, "soundcpu", 0 ) // sound CPU
 	ROM_LOAD( "epr-12168.a7", 0x0000, 0x8000, CRC(bd9ba01b) SHA1(fafa7dc36cc057a50ae4cdf7a35f3594292336f4) )