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Diffstat (limited to 'src/devices/machine/6850acia.h')
-rw-r--r--src/devices/machine/6850acia.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/devices/machine/6850acia.h b/src/devices/machine/6850acia.h
index 4d4086fd4af..52bdccfd9dd 100644
--- a/src/devices/machine/6850acia.h
+++ b/src/devices/machine/6850acia.h
@@ -27,7 +27,7 @@ class acia6850_device : public device_t
{
public:
// construction/destruction
- acia6850_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+ acia6850_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
// static configuration helpers
template <class Object> devcb_base &set_txd_handler(Object &&cb) { return m_txd_handler.set_callback(std::forward<Object>(cb)); }