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-rw-r--r--src/mame/drivers/blueprnt.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/blueprnt.cpp b/src/mame/drivers/blueprnt.cpp
index b99d4516e5b..54b7007b4c5 100644
--- a/src/mame/drivers/blueprnt.cpp
+++ b/src/mame/drivers/blueprnt.cpp
@@ -359,7 +359,7 @@ void blueprnt_state::blueprnt(machine_config &config)
m_audiocpu->set_periodic_int(FUNC(blueprnt_state::irq0_line_hold), attotime::from_hz(4*60)); // IRQs connected to 32V
// NMIs are caused by the main CPU
- config.m_perfect_cpu_quantum = subtag("maincpu");
+ config.set_perfect_quantum(m_maincpu);
WATCHDOG_TIMER(config, "watchdog");