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-rw-r--r--src/mame/machine/zs01.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/machine/zs01.cpp b/src/mame/machine/zs01.cpp
index 84fda99e05b..613a3cdcc1a 100644
--- a/src/mame/machine/zs01.cpp
+++ b/src/mame/machine/zs01.cpp
@@ -47,7 +47,7 @@ zs01_device::zs01_device( const machine_config &mconfig, const char *tag, device
void zs01_device::device_start()
{
m_ds2401 = siblingdevice<ds2401_device>(m_ds2401_tag);
- if( m_ds2401 == NULL )
+ if( m_ds2401 == nullptr )
{
logerror( "ds2401 '%s' not found\n", m_ds2401_tag );
}