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-rw-r--r--src/mame/video/vectrex.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/video/vectrex.cpp b/src/mame/video/vectrex.cpp
index 30fa2ea66a7..32943a2061c 100644
--- a/src/mame/video/vectrex.cpp
+++ b/src/mame/video/vectrex.cpp
@@ -49,7 +49,7 @@ TIMER_CALLBACK_MEMBER(vectrex_base_state::lightpen_trigger)
if (m_lightpen_port & 2)
{
- m_maincpu->set_input_line(M6809_FIRQ_LINE, PULSE_LINE);
+ m_maincpu->pulse_input_line(M6809_FIRQ_LINE, m_maincpu->minimum_quantum_time());
}
}