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-rw-r--r--src/mame/drivers/sfcbox.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/sfcbox.cpp b/src/mame/drivers/sfcbox.cpp
index a40cede34f1..477f07c316a 100644
--- a/src/mame/drivers/sfcbox.cpp
+++ b/src/mame/drivers/sfcbox.cpp
@@ -466,7 +466,7 @@ MACHINE_CONFIG_START(sfcbox_state::sfcbox)
MCFG_DEVICE_ADD("soundcpu", SPC700, XTAL(24'576'000) / 12)
MCFG_DEVICE_PROGRAM_MAP(spc_mem)
- MCFG_QUANTUM_PERFECT_CPU("maincpu")
+ config.m_perfect_cpu_quantum = subtag("maincpu");
/* sfcbox hardware */
MCFG_DEVICE_ADD("bios", Z180, XTAL(12'000'000) / 2) /* HD64180RF6X */