diff --git a/src/mame/drivers/cave.c b/src/mame/drivers/cave.c
index 2ef11dd2dda..f97df32d366 100644
--- a/src/mame/drivers/cave.c
+++ b/src/mame/drivers/cave.c
@@ -2102,11 +2102,11 @@ static MACHINE_CONFIG_START( donpachi, cave_state )
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
 
-	MCFG_OKIM6295_ADD("oki1", XTAL_1_056MHz, OKIM6295_PIN7_HIGH) // clock frequency & pin 7 not verified
+	MCFG_OKIM6295_ADD("oki1", XTAL_4_224MHz/4, OKIM6295_PIN7_HIGH) // pin 7 not verified
 	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 1.60)
 	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 1.60)
 
-	MCFG_OKIM6295_ADD("oki2", 2112000, OKIM6295_PIN7_HIGH) // clock frequency & pin 7 not verified
+	MCFG_OKIM6295_ADD("oki2", XTAL_4_224MHz/2, OKIM6295_PIN7_HIGH) // pin 7 not verified
 	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 1.0)
 	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 1.0)
 
diff --git a/src/mame/drivers/taito_f2.c b/src/mame/drivers/taito_f2.c
index 9e0b264061b..5cd58a06196 100644
--- a/src/mame/drivers/taito_f2.c
+++ b/src/mame/drivers/taito_f2.c
@@ -3606,7 +3606,7 @@ static MACHINE_CONFIG_START( cameltrya, taitof2_state )
 	MCFG_SOUND_ROUTE(2, "mono", 0.20)
 	MCFG_SOUND_ROUTE(3, "mono", 0.60)
 
-	MCFG_OKIM6295_ADD("oki", 4224000/4, OKIM6295_PIN7_HIGH) /* verified on pcb */
+	MCFG_OKIM6295_ADD("oki", XTAL_4_224MHz/4, OKIM6295_PIN7_HIGH) /* verified on pcb */
 	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.10)
 
 	MCFG_TC0140SYT_ADD("tc0140syt", taitof2_tc0140syt_intf)