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-rw-r--r--src/mame/drivers/firetrap.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/firetrap.cpp b/src/mame/drivers/firetrap.cpp
index a99e04ede61..088815b8eeb 100644
--- a/src/mame/drivers/firetrap.cpp
+++ b/src/mame/drivers/firetrap.cpp
@@ -577,7 +577,7 @@ void firetrap_state::firetrap(machine_config &config)
m_mcu->port_out_cb<3>().set(FUNC(firetrap_state::mcu_p3_w));
// needs a tight sync with the mcu
- config.m_perfect_cpu_quantum = subtag("maincpu");
+ config.set_perfect_quantum(m_maincpu);
TIMER(config, "scantimer", 0).configure_scanline(FUNC(firetrap_state::interrupt), "screen", 0, 1);