diff --git a/src/mame/drivers/jungleyo.cpp b/src/mame/drivers/jungleyo.cpp
index c950e39053a..caf1e6916e5 100644
--- a/src/mame/drivers/jungleyo.cpp
+++ b/src/mame/drivers/jungleyo.cpp
@@ -120,7 +120,7 @@ GFXDECODE_END
 
 MACHINE_CONFIG_START(jungleyo_state::jungleyo)
 
-	MCFG_DEVICE_ADD("maincpu", M68000, XTAL(12'000'000))
+	MCFG_DEVICE_ADD("maincpu", M68000, 24_MHz_XTAL / 2)
 	MCFG_DEVICE_PROGRAM_MAP(jungleyo_map)
 	MCFG_DEVICE_VBLANK_INT_DRIVER("screen", jungleyo_state,  irq1_line_hold)
 
@@ -140,7 +140,7 @@ MACHINE_CONFIG_START(jungleyo_state::jungleyo)
 	SPEAKER(config, "lspeaker").front_left();
 	SPEAKER(config, "rspeaker").front_right();
 
-	MCFG_DEVICE_ADD("oki", OKIM6295, XTAL(12'000'000)/16, okim6295_device::PIN7_HIGH) // clock frequency & pin 7 not verified
+	MCFG_DEVICE_ADD("oki", OKIM6295, 24_MHz_XTAL / 20, okim6295_device::PIN7_HIGH) // clock frequency & pin 7 not verified
 	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 0.47)
 	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 0.47)
 MACHINE_CONFIG_END