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-rw-r--r--src/mame/drivers/alinvade.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/alinvade.cpp b/src/mame/drivers/alinvade.cpp
index a13baceb064..932c1cd87b3 100644
--- a/src/mame/drivers/alinvade.cpp
+++ b/src/mame/drivers/alinvade.cpp
@@ -87,7 +87,7 @@ void alinvade_state::sound_w(uint8_t data)
void alinvade_state::sounden_w(uint8_t data)
{
- machine().sound().system_enable(data == 4);
+ machine().sound().system_mute(data != 4);
}
uint8_t alinvade_state::irqmask_r()