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-rw-r--r--src/devices/machine/tube.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/devices/machine/tube.h b/src/devices/machine/tube.h
index 079c89cf86d..eb6171c50e5 100644
--- a/src/devices/machine/tube.h
+++ b/src/devices/machine/tube.h
@@ -24,7 +24,7 @@ class tube_device : public device_t
{
public:
// construction/destruction
- tube_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
+ tube_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock = XTAL());
// callbacks
auto hirq_handler() { return m_hirq_handler.bind(); }