diff --git a/src/mame/drivers/naomi.c b/src/mame/drivers/naomi.c
index 649186f4603..3697283bb49 100644
--- a/src/mame/drivers/naomi.c
+++ b/src/mame/drivers/naomi.c
@@ -852,7 +852,7 @@ EPR-21330 & EPR-21331 differ by 7 bytes:
 Ferrari F355 specific Naomi BIOS roms:
 
 EPR-22850 - NAOMI BOOT ROM 1999 08/30  1.35 (USA)
-EPR-22850 - NAOMI BOOT ROM 1999 08/30  1.35 (Export)
+EPR-22851 - NAOMI BOOT ROM 1999 08/30  1.35 (Export)
 
 EPR-22850 & EPR-22851 differ by 7 bytes: