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-rw-r--r--src/mame/machine/mhavoc.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/machine/mhavoc.cpp b/src/mame/machine/mhavoc.cpp
index db0c00537cd..81a4b93db40 100644
--- a/src/mame/machine/mhavoc.cpp
+++ b/src/mame/machine/mhavoc.cpp
@@ -129,7 +129,7 @@ TIMER_CALLBACK_MEMBER(mhavoc_state::delayed_gamma_w)
m_alpha_data = param;
/* signal with an NMI pulse */
- m_gamma->set_input_line(INPUT_LINE_NMI, PULSE_LINE);
+ m_gamma->pulse_input_line(INPUT_LINE_NMI, attotime::zero);
/* the sound CPU needs to reply in 250microseconds (according to Neil Bradley) */
machine().scheduler().timer_set(attotime::from_usec(250), timer_expired_delegate());