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-rw-r--r--src/mame/drivers/tugboat.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/tugboat.cpp b/src/mame/drivers/tugboat.cpp
index 93e6e1863d6..aca5d649683 100644
--- a/src/mame/drivers/tugboat.cpp
+++ b/src/mame/drivers/tugboat.cpp
@@ -221,7 +221,7 @@ void tugboat_state::device_timer(emu_timer &timer, device_timer_id id, int param
m_interrupt_timer->adjust(m_screen->frame_period());
break;
default:
- assert_always(false, "Unknown id in tugboat_state::device_timer");
+ throw emu_fatalerror("Unknown id in tugboat_state::device_timer");
}
}