diff --git a/src/mess/drivers/mmodular.c b/src/mess/drivers/mmodular.c
index 538c0b7bc76..e3b9c3c0af8 100644
--- a/src/mess/drivers/mmodular.c
+++ b/src/mess/drivers/mmodular.c
@@ -1658,7 +1658,7 @@ static MACHINE_CONFIG_START( van16, polgar_state )
 	MCFG_MACHINE_START_OVERRIDE(polgar_state,van16)
 	MCFG_MACHINE_RESET_OVERRIDE(polgar_state,van16)
 	MCFG_TIMER_DRIVER_ADD_PERIODIC("int_timer", polgar_state, timer_update_irq6, attotime::from_hz(600))
-	MCFG_TIMER_DRIVER_ADD_PERIODIC("int_timer", polgar_state, timer_update_irq6, attotime::from_hz(587))
+	//MCFG_TIMER_DRIVER_ADD_PERIODIC("int_timer", polgar_state, timer_update_irq6, attotime::from_hz(587))
 	MCFG_TIMER_ADD_PERIODIC("artwork_timer", mboard_update_artwork, attotime::from_hz(120))
 	MCFG_FRAGMENT_ADD( chess_common )
 	MCFG_NVRAM_ADD_0FILL("nvram")
@@ -1701,7 +1701,7 @@ static MACHINE_CONFIG_START( gen32, polgar_state )
 	MCFG_MACHINE_START_OVERRIDE(polgar_state,van32)
 	MCFG_MACHINE_RESET_OVERRIDE(polgar_state,van16)
 	MCFG_TIMER_DRIVER_ADD_PERIODIC("int_timer", polgar_state, timer_update_irq6, attotime::from_hz(375))
-	MCFG_TIMER_DRIVER_ADD_PERIODIC("int_timer", polgar_state, timer_update_irq6, attotime::from_hz(368.64))
+	//MCFG_TIMER_DRIVER_ADD_PERIODIC("int_timer", polgar_state, timer_update_irq6, attotime::from_hz(368.64))
 	MCFG_TIMER_ADD_PERIODIC("artwork_timer", mboard_update_artwork, attotime::from_hz(120))
 
 	MCFG_FRAGMENT_ADD( chess_common )