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-rw-r--r--src/mame/drivers/alto2.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/alto2.cpp b/src/mame/drivers/alto2.cpp
index bbcf2135b0e..6cfed0f62e2 100644
--- a/src/mame/drivers/alto2.cpp
+++ b/src/mame/drivers/alto2.cpp
@@ -303,7 +303,7 @@ MACHINE_CONFIG_START(alto2_state::alto2)
MCFG_PALETTE_ADD_MONOCHROME("palette")
// Sound hardware
- MCFG_SPEAKER_STANDARD_MONO("mono")
+ SPEAKER(config, "mono").front_center();
MCFG_DEVICE_ADD("speaker", SPEAKER_SOUND)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.80)