diff --git a/src/mame/drivers/midvunit.c b/src/mame/drivers/midvunit.c
index 6168b233178..3178079651c 100644
--- a/src/mame/drivers/midvunit.c
+++ b/src/mame/drivers/midvunit.c
@@ -1267,10 +1267,10 @@ ROM_START( crusnwld ) /* Version 2.5, Wed Nov 04 1998 - 15:50:52 */
 	ROM_LOAD16_BYTE( "cwld.u9",  0xe00000, 0x80000, CRC(84cdc781) SHA1(62287aa72903698d1890908adde53c39f8bd200c) )
 
 	ROM_REGION32_LE( 0x1000000, "user1", 0 )
-	ROM_LOAD32_BYTE( "crusnw25.u10", 0x0000000, 0x100000, CRC(fd776872) SHA1(90df230b58b1c60d1ca7545ef177e5df30b4ea9d) )
-	ROM_LOAD32_BYTE( "crusnw25.u11", 0x0000001, 0x100000, CRC(0c99a405) SHA1(14251187f00c198fbaa39817f8c95d1dbec80ec0) )
-	ROM_LOAD32_BYTE( "crusnw25.u12", 0x0000002, 0x100000, CRC(3ba9fad8) SHA1(ac8d0dd4df3c1f1c28d93d615d7e24aed4a4a9b5) )
-	ROM_LOAD32_BYTE( "crusnw25.u13", 0x0000003, 0x100000, CRC(21a79c9a) SHA1(e33f768c2309613e4936416ee5250d3b1690d11d) )
+	ROM_LOAD32_BYTE( "crusnw25.u10", 0x0000000, 0x100000, CRC(fd776872) SHA1(90df230b58b1c60d1ca7545ef177e5df30b4ea9d) ) /* Labeled 2.5 Cruis'n World Automatic U10 */
+	ROM_LOAD32_BYTE( "crusnw25.u11", 0x0000001, 0x100000, CRC(0c99a405) SHA1(14251187f00c198fbaa39817f8c95d1dbec80ec0) ) /* Labeled 2.5 Cruis'n World Automatic U11 */
+	ROM_LOAD32_BYTE( "crusnw25.u12", 0x0000002, 0x100000, CRC(3ba9fad8) SHA1(ac8d0dd4df3c1f1c28d93d615d7e24aed4a4a9b5) ) /* Labeled 2.5 Cruis'n World Automatic U12 */
+	ROM_LOAD32_BYTE( "crusnw25.u13", 0x0000003, 0x100000, CRC(21a79c9a) SHA1(e33f768c2309613e4936416ee5250d3b1690d11d) ) /* Labeled 2.5 Cruis'n World Automatic U13 */
 	ROM_LOAD32_BYTE( "cwld.u14",     0x0400000, 0x100000, CRC(ee815091) SHA1(fb8a99bae07f42966f76a3bb073d7d8280d8efcb) )
 	ROM_LOAD32_BYTE( "cwld.u15",     0x0400001, 0x100000, CRC(e2da7bf1) SHA1(9d9a80055ee62476f47c95e30ec9a989d5d0e25b) )
 	ROM_LOAD32_BYTE( "cwld.u16",     0x0400002, 0x100000, CRC(05a7ad2f) SHA1(4bdfde671379ecefa3f8ceb6fc06e8df5d70fc22) )