diff --git a/src/mame/drivers/slapfght.c b/src/mame/drivers/slapfght.c
index 4779f269006..44768f4b9f3 100644
--- a/src/mame/drivers/slapfght.c
+++ b/src/mame/drivers/slapfght.c
@@ -1394,9 +1394,9 @@ ROM_START( alcon )
 
 
 	ROM_REGION( 0x0300, "proms", 0 )
-	ROM_LOAD( "21_82S129.12q", 0x0000,  0x0100, CRC(a0efaf99) SHA1(5df01663480acad1f89abab8662d437617a66d1c) ) /* Silkscreened as ROM21 */
-	ROM_LOAD( "20_82S129.12m", 0x0100,  0x0100, CRC(a56d57e5) SHA1(bfbd0db52b23fe1b4994e05103be3d412c1c013e) ) /* Silkscreened as ROM20 */
-	ROM_LOAD( "19_82S129.12n", 0x0200,  0x0100, CRC(5cbf9fbf) SHA1(abfa58fa4e44ebc56f2e0fac9bcc36164c845fa3) ) /* Silkscreened as ROM19 */
+	ROM_LOAD( "21_82s129.12q", 0x0000,  0x0100, CRC(a0efaf99) SHA1(5df01663480acad1f89abab8662d437617a66d1c) ) /* Silkscreened as ROM21 */
+	ROM_LOAD( "20_82s129.12m", 0x0100,  0x0100, CRC(a56d57e5) SHA1(bfbd0db52b23fe1b4994e05103be3d412c1c013e) ) /* Silkscreened as ROM20 */
+	ROM_LOAD( "19_82s129.12n", 0x0200,  0x0100, CRC(5cbf9fbf) SHA1(abfa58fa4e44ebc56f2e0fac9bcc36164c845fa3) ) /* Silkscreened as ROM19 */
 ROM_END
 
 ROM_START( slapfigh )
@@ -1427,9 +1427,9 @@ ROM_START( slapfigh )
 	ROM_LOAD( "a77_09.7h", 0x18000, 0x8000, CRC(587113ae) SHA1(90abe961494a1af7c87693a419fbabf7a58a5dee) )
 
 	ROM_REGION( 0x0300, "proms", 0 )
-	ROM_LOAD( "21_82S129.12q", 0x0000,  0x0100, CRC(a0efaf99) SHA1(5df01663480acad1f89abab8662d437617a66d1c) ) /* Silkscreened as ROM21 */
-	ROM_LOAD( "20_82S129.12m", 0x0100,  0x0100, CRC(a56d57e5) SHA1(bfbd0db52b23fe1b4994e05103be3d412c1c013e) ) /* Silkscreened as ROM20 */
-	ROM_LOAD( "19_82S129.12n", 0x0200,  0x0100, CRC(5cbf9fbf) SHA1(abfa58fa4e44ebc56f2e0fac9bcc36164c845fa3) ) /* Silkscreened as ROM19 */
+	ROM_LOAD( "21_82s129.12q", 0x0000,  0x0100, CRC(a0efaf99) SHA1(5df01663480acad1f89abab8662d437617a66d1c) ) /* Silkscreened as ROM21 */
+	ROM_LOAD( "20_82s129.12m", 0x0100,  0x0100, CRC(a56d57e5) SHA1(bfbd0db52b23fe1b4994e05103be3d412c1c013e) ) /* Silkscreened as ROM20 */
+	ROM_LOAD( "19_82s129.12n", 0x0200,  0x0100, CRC(5cbf9fbf) SHA1(abfa58fa4e44ebc56f2e0fac9bcc36164c845fa3) ) /* Silkscreened as ROM19 */
 ROM_END
 
 /*