diff --git a/src/mame/drivers/segaybd.c b/src/mame/drivers/segaybd.c
index 776c9a80436..cb08e49fa65 100644
--- a/src/mame/drivers/segaybd.c
+++ b/src/mame/drivers/segaybd.c
@@ -1504,11 +1504,11 @@ ROM_START( pdrift )
 
 	ROM_REGION( 0x200000, "pcm", ROMREGION_ERASEFF )	/* SegaPCM samples */
 	ROM_LOAD( "mpr-11754.107",  0x000000, 0x80000, CRC(ebeb8484) SHA1(269f33cb1a9be126bada858e25291385d48686a2) )
-	ROM_LOAD( "epr-11755.105",  0x080000, 0x20000, CRC(12e43f8a) SHA1(0f9a11ba6b7c1a352daa1146a01ce147945e91e4) )
+	ROM_LOAD( "epr-11756.105",  0x080000, 0x20000, CRC(12e43f8a) SHA1(0f9a11ba6b7c1a352daa1146a01ce147945e91e4) )
 	ROM_RELOAD(                 0x0a0000, 0x20000 )
 	ROM_RELOAD(                 0x0c0000, 0x20000 )
 	ROM_RELOAD(                 0x0e0000, 0x20000 )
-	ROM_LOAD( "epr-11756.106",  0x100000, 0x20000, CRC(c2db1244) SHA1(c98fe17c9f04a639a862cc2a86fab17d1f5d025c) )
+	ROM_LOAD( "epr-11755.106",  0x100000, 0x20000, CRC(c2db1244) SHA1(c98fe17c9f04a639a862cc2a86fab17d1f5d025c) )
 	ROM_RELOAD(                 0x120000, 0x20000 )
 	ROM_RELOAD(                 0x140000, 0x20000 )
 	ROM_RELOAD(                 0x160000, 0x20000 )
@@ -1584,11 +1584,11 @@ ROM_START( pdrifta )
 
 	ROM_REGION( 0x200000, "pcm", ROMREGION_ERASEFF )	/* SegaPCM samples */
 	ROM_LOAD( "mpr-11754.107",  0x000000, 0x80000, CRC(ebeb8484) SHA1(269f33cb1a9be126bada858e25291385d48686a2) )
-	ROM_LOAD( "epr-11755.105",  0x080000, 0x20000, CRC(12e43f8a) SHA1(0f9a11ba6b7c1a352daa1146a01ce147945e91e4) )
+	ROM_LOAD( "epr-11756.105",  0x080000, 0x20000, CRC(12e43f8a) SHA1(0f9a11ba6b7c1a352daa1146a01ce147945e91e4) )
 	ROM_RELOAD(                 0x0a0000, 0x20000 )
 	ROM_RELOAD(                 0x0c0000, 0x20000 )
 	ROM_RELOAD(                 0x0e0000, 0x20000 )
-	ROM_LOAD( "epr-11756.106",  0x100000, 0x20000, CRC(c2db1244) SHA1(c98fe17c9f04a639a862cc2a86fab17d1f5d025c) )
+	ROM_LOAD( "epr-11755.106",  0x100000, 0x20000, CRC(c2db1244) SHA1(c98fe17c9f04a639a862cc2a86fab17d1f5d025c) )
 	ROM_RELOAD(                 0x120000, 0x20000 )
 	ROM_RELOAD(                 0x140000, 0x20000 )
 	ROM_RELOAD(                 0x160000, 0x20000 )
@@ -1664,11 +1664,11 @@ ROM_START( pdrifte ) /* Earlier set based on eprom numbers & Sega Eprom/Mask Rom
 
 	ROM_REGION( 0x200000, "pcm", ROMREGION_ERASEFF )	/* SegaPCM samples */
 	ROM_LOAD( "mpr-11754.107",  0x000000, 0x80000, CRC(ebeb8484) SHA1(269f33cb1a9be126bada858e25291385d48686a2) )
-	ROM_LOAD( "epr-11755.105",  0x080000, 0x20000, CRC(12e43f8a) SHA1(0f9a11ba6b7c1a352daa1146a01ce147945e91e4) )
+	ROM_LOAD( "epr-11756.105",  0x080000, 0x20000, CRC(12e43f8a) SHA1(0f9a11ba6b7c1a352daa1146a01ce147945e91e4) )
 	ROM_RELOAD(                 0x0a0000, 0x20000 )
 	ROM_RELOAD(                 0x0c0000, 0x20000 )
 	ROM_RELOAD(                 0x0e0000, 0x20000 )
-	ROM_LOAD( "epr-11756.106",  0x100000, 0x20000, CRC(c2db1244) SHA1(c98fe17c9f04a639a862cc2a86fab17d1f5d025c) )
+	ROM_LOAD( "epr-11755.106",  0x100000, 0x20000, CRC(c2db1244) SHA1(c98fe17c9f04a639a862cc2a86fab17d1f5d025c) )
 	ROM_RELOAD(                 0x120000, 0x20000 )
 	ROM_RELOAD(                 0x140000, 0x20000 )
 	ROM_RELOAD(                 0x160000, 0x20000 )
@@ -1750,11 +1750,11 @@ ROM_START( pdriftj )
 
 	ROM_REGION( 0x200000, "pcm", ROMREGION_ERASEFF )	/* SegaPCM samples */
 	ROM_LOAD( "mpr-11754.107",  0x000000, 0x80000, CRC(ebeb8484) SHA1(269f33cb1a9be126bada858e25291385d48686a2) )
-	ROM_LOAD( "epr-11755.105",  0x080000, 0x20000, CRC(12e43f8a) SHA1(0f9a11ba6b7c1a352daa1146a01ce147945e91e4) )
+	ROM_LOAD( "epr-11756.105",  0x080000, 0x20000, CRC(12e43f8a) SHA1(0f9a11ba6b7c1a352daa1146a01ce147945e91e4) )
 	ROM_RELOAD(                 0x0a0000, 0x20000 )
 	ROM_RELOAD(                 0x0c0000, 0x20000 )
 	ROM_RELOAD(                 0x0e0000, 0x20000 )
-	ROM_LOAD( "epr-11756.106",  0x100000, 0x20000, CRC(c2db1244) SHA1(c98fe17c9f04a639a862cc2a86fab17d1f5d025c) )
+	ROM_LOAD( "epr-11755.106",  0x100000, 0x20000, CRC(c2db1244) SHA1(c98fe17c9f04a639a862cc2a86fab17d1f5d025c) )
 	ROM_RELOAD(                 0x120000, 0x20000 )
 	ROM_RELOAD(                 0x140000, 0x20000 )
 	ROM_RELOAD(                 0x160000, 0x20000 )