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-rw-r--r--src/mame/drivers/popper.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/popper.cpp b/src/mame/drivers/popper.cpp
index ae442d5eb6c..afcd98b76a1 100644
--- a/src/mame/drivers/popper.cpp
+++ b/src/mame/drivers/popper.cpp
@@ -543,7 +543,7 @@ void popper_state::popper(machine_config &config)
Z80(config, m_subcpu, XTAL(18'432'000)/3/2);
m_subcpu->set_addrmap(AS_PROGRAM, &popper_state::sub_map);
- config.m_perfect_cpu_quantum = subtag("maincpu");
+ config.set_perfect_quantum(m_maincpu);
// video hardware
SCREEN(config, m_screen, SCREEN_TYPE_RASTER);