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-rw-r--r--src/mame/machine/pce220_ser.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/mame/machine/pce220_ser.h b/src/mame/machine/pce220_ser.h
index ec52e5c0476..e1d48a02cb8 100644
--- a/src/mame/machine/pce220_ser.h
+++ b/src/mame/machine/pce220_ser.h
@@ -38,9 +38,9 @@ public:
virtual bool is_creatable() const { return 1; }
virtual bool must_be_loaded() const { return 0; }
virtual bool is_reset_on_load() const { return 0; }
- virtual const char *image_interface() const { return NULL; }
+ virtual const char *image_interface() const { return nullptr; }
virtual const char *file_extensions() const { return "txt,ihx"; }
- virtual const option_guide *create_option_guide() const { return NULL; }
+ virtual const option_guide *create_option_guide() const { return nullptr; }
// specific implementation
UINT8 in_xin(void) { return m_xin & 0x01; }