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-rw-r--r--src/mame/drivers/osi.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/osi.cpp b/src/mame/drivers/osi.cpp
index 2b89d4f3811..cbef219c645 100644
--- a/src/mame/drivers/osi.cpp
+++ b/src/mame/drivers/osi.cpp
@@ -918,7 +918,7 @@ void c1p_state::device_timer(emu_timer &timer, device_timer_id id, int param, vo
m_beeper->set_clock(300);
break;
default:
- assert_always(false, "Unknown id in sb2m600_state::device_timer");
+ throw emu_fatalerror("Unknown id in c1p_state::device_timer");
}
}