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-rw-r--r--src/emu/machine/pci-smbus.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/emu/machine/pci-smbus.c b/src/emu/machine/pci-smbus.c
index bc631951808..bf03c79210a 100644
--- a/src/emu/machine/pci-smbus.c
+++ b/src/emu/machine/pci-smbus.c
@@ -13,6 +13,7 @@ smbus_device::smbus_device(const machine_config &mconfig, const char *tag, devic
void smbus_device::device_start()
{
pci_device::device_start();
+ skip_map_regs(4);
add_map(32, M_IO, FUNC(smbus_device::map));
}