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-rw-r--r--src/mame/drivers/vsnes.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/vsnes.cpp b/src/mame/drivers/vsnes.cpp
index 1eb5d61eee5..e324e0cf148 100644
--- a/src/mame/drivers/vsnes.cpp
+++ b/src/mame/drivers/vsnes.cpp
@@ -1837,7 +1837,7 @@ void vsnes_state::vsdual(machine_config &config)
void vsnes_state::vsdual_pi(machine_config &config)
{
vsdual(config);
- config.m_perfect_cpu_quantum = subtag("maincpu");
+ config.set_perfect_quantum(m_maincpu);
// need high level of interleave to keep screens in sync in Balloon Fight.
// however vsmahjng doesn't like perfect interleave? you end up needing to reset it to boot? maybe something in a bad default state? watchdog?
// as the board would always be running in 'perfect interleave' the fact the Mahjong game doesn't work like this needs investigating.