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-rw-r--r--src/mame/machine/vertigo.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/machine/vertigo.c b/src/mame/machine/vertigo.c
index b1fd9bc8439..0b8b3f3a225 100644
--- a/src/mame/machine/vertigo.c
+++ b/src/mame/machine/vertigo.c
@@ -174,7 +174,7 @@ static TIMER_CALLBACK( sound_command_w )
WRITE16_HANDLER( vertigo_audio_w )
{
if (ACCESSING_LSB)
- timer_call_after_resynch(data & 0xff, sound_command_w);
+ timer_call_after_resynch(NULL, data & 0xff, sound_command_w);
}
READ16_HANDLER( vertigo_sio_r )