diff --git a/src/mame/drivers/karnov.cpp b/src/mame/drivers/karnov.cpp
index 19eba35427a..20009115d13 100644
--- a/src/mame/drivers/karnov.cpp
+++ b/src/mame/drivers/karnov.cpp
@@ -916,6 +916,7 @@ static MACHINE_CONFIG_START( wndrplnt )
 	MCFG_SPEAKER_STANDARD_MONO("mono")
 
 	MCFG_GENERIC_LATCH_8_ADD("soundlatch")
+	MCFG_GENERIC_LATCH_DATA_PENDING_CB(INPUTLINE("audiocpu", INPUT_LINE_NMI))
 
 	MCFG_SOUND_ADD("ym1", YM2203, 1500000)
 	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)