diff --git a/src/mame/drivers/namcos2.cpp b/src/mame/drivers/namcos2.cpp
index 49fc5f7b317..935c71da93b 100644
--- a/src/mame/drivers/namcos2.cpp
+++ b/src/mame/drivers/namcos2.cpp
@@ -2069,8 +2069,8 @@ static MACHINE_CONFIG_START( metlhawk )
 
 	MCFG_CPU_ADD("audiocpu", M6809, M68B09_CPU_CLOCK) /* 2.048MHz (49.152MHz OSC/24) - Sound handling */
 	MCFG_CPU_PROGRAM_MAP(sound_default_am)
-	//MCFG_CPU_PERIODIC_INT_DRIVER(namcos2_shared_state, irq0_line_hold, 2*60)
-	//MCFG_CPU_PERIODIC_INT_DRIVER(namcos2_shared_state, irq1_line_hold, 120)
+	MCFG_CPU_PERIODIC_INT_DRIVER(namcos2_shared_state, irq0_line_hold, 2*60)
+	MCFG_CPU_PERIODIC_INT_DRIVER(namcos2_shared_state, irq1_line_hold, 120)
 
 	MCFG_CPU_ADD("mcu", HD63705, C65_CPU_CLOCK) /* 2.048MHz (49.152MHz OSC/24) - I/O handling */
 	MCFG_CPU_PROGRAM_MAP(mcu_default_am)
@@ -2107,7 +2107,7 @@ static MACHINE_CONFIG_START( metlhawk )
 	MCFG_SOUND_ROUTE(1, "rspeaker", 1.0)
 
 	MCFG_YM2151_ADD("ymsnd", YM2151_SOUND_CLOCK) /* 3.579545MHz */
-	MCFG_YM2151_IRQ_HANDLER(INPUTLINE("audiocpu", 1))
+//	MCFG_YM2151_IRQ_HANDLER(INPUTLINE("audiocpu", 1))
 	MCFG_SOUND_ROUTE(0, "lspeaker", 0.80)
 	MCFG_SOUND_ROUTE(1, "rspeaker", 0.80)
 MACHINE_CONFIG_END