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-rw-r--r--src/mame/drivers/lockon.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/lockon.cpp b/src/mame/drivers/lockon.cpp
index 9648e829649..0f5fb97040c 100644
--- a/src/mame/drivers/lockon.cpp
+++ b/src/mame/drivers/lockon.cpp
@@ -486,7 +486,7 @@ MACHINE_CONFIG_START(lockon_state::lockon)
MCFG_DEVICE_IO_MAP(sound_io)
WATCHDOG_TIMER(config, m_watchdog).set_time(PERIOD_OF_555_ASTABLE(10000, 4700, 10000e-12) * 4096);
- MCFG_QUANTUM_TIME(attotime::from_hz(600))
+ config.m_minimum_quantum = attotime::from_hz(600);
m58990_device &adc(M58990(config, "adc", 16_MHz_XTAL / 16));
adc.in_callback<0>().set_ioport("ADC_BANK");