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-rw-r--r--src/mame/machine/smartboard.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/machine/smartboard.h b/src/mame/machine/smartboard.h
index e42981b7d4d..33d6423a4fa 100644
--- a/src/mame/machine/smartboard.h
+++ b/src/mame/machine/smartboard.h
@@ -24,7 +24,7 @@ class tasc_sb30_device : public device_t
{
public:
// construction/destruction
- tasc_sb30_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+ tasc_sb30_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
uint8_t read();
void write(uint8_t data);