diff --git a/src/mame/drivers/naomi.c b/src/mame/drivers/naomi.c
index 6b678414e3c..6084beece03 100644
--- a/src/mame/drivers/naomi.c
+++ b/src/mame/drivers/naomi.c
@@ -6800,7 +6800,7 @@ ROM_START( tetkiwam )
 	ROM_LOAD("tetkiwam-default-eeprom.bin", 0, 0x80, CRC(843f2a99) SHA1(6615f5f27e76a71f7415f972bbcdf6570b0e953a))
 
 	DISK_REGION( "gdrom" )
-	DISK_IMAGE_READONLY( "gdl-0020", 0, BAD_DUMP SHA1(7b2ef47ca2038d6a93615b760b03e8f7cb1b83c2) )
+	DISK_IMAGE_READONLY( "gdl-0020", 0, SHA1(55813b6487b303da544611f16b9d74b23184590c) )
 
 	ROM_REGION( 0x4000, "pic", ROMREGION_ERASEFF)
 	//PIC16C622A (317-5093-JPN)
@@ -7548,7 +7548,7 @@ ROM_START( ngdup23c )
 	NAOMI_DEFAULT_EEPROM
 
 	DISK_REGION( "gdrom" )
-	DISK_IMAGE_READONLY( "gds-0023c", 0, BAD_DUMP SHA1(1fcb5530748886f4c4f45487d047859182ff7496))
+	DISK_IMAGE_READONLY( "gds-0023c", 0, SHA1(a2885169cb5bedbf2352e9f34947e40a8ec93552))
 
 	ROM_REGION( 0x4000, "pic", ROMREGION_ERASEFF) // uses the vf4 evolution pic
 	//PIC16C622A (317-0338-JPN)