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Diffstat (limited to 'src/mame/drivers/hx20.cpp')
-rw-r--r--src/mame/drivers/hx20.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/hx20.cpp b/src/mame/drivers/hx20.cpp
index d1849d1c7e9..56d705e96bd 100644
--- a/src/mame/drivers/hx20.cpp
+++ b/src/mame/drivers/hx20.cpp
@@ -852,7 +852,7 @@ static MACHINE_CONFIG_START( hx20, hx20_state )
// devices
MCFG_MC146818_ADD(MC146818_TAG, XTAL_4_194304Mhz)
MCFG_MC146818_IRQ_HANDLER(WRITELINE(hx20_state, rtc_irq_w))
- MCFG_RS232_PORT_ADD(RS232_TAG, default_rs232_devices, NULL)
+ MCFG_RS232_PORT_ADD(RS232_TAG, default_rs232_devices, nullptr)
MCFG_CASSETTE_ADD(CASSETTE_TAG)
MCFG_EPSON_SIO_ADD("sio", "tf20")
MCFG_EPSON_SIO_RX(WRITELINE(hx20_state, sio_rx_w))