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-rw-r--r--src/devices/bus/ieee488/shark.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/devices/bus/ieee488/shark.cpp b/src/devices/bus/ieee488/shark.cpp
index 47582aa42b8..bdb11f6d261 100644
--- a/src/devices/bus/ieee488/shark.cpp
+++ b/src/devices/bus/ieee488/shark.cpp
@@ -85,7 +85,7 @@ static MACHINE_CONFIG_FRAGMENT( mshark )
// devices
MCFG_HARDDISK_ADD("harddisk1")
- MCFG_RS232_PORT_ADD(RS232_TAG, default_rs232_devices, NULL)
+ MCFG_RS232_PORT_ADD(RS232_TAG, default_rs232_devices, nullptr)
MACHINE_CONFIG_END