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-rw-r--r--src/mame/drivers/poly88.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/poly88.cpp b/src/mame/drivers/poly88.cpp
index e9eacfb6fed..ad15d5675fd 100644
--- a/src/mame/drivers/poly88.cpp
+++ b/src/mame/drivers/poly88.cpp
@@ -217,7 +217,7 @@ MACHINE_CONFIG_START(poly88_state::poly88)
/* audio hardware */
- MCFG_SPEAKER_STANDARD_MONO("mono")
+ SPEAKER(config, "mono").front_center();
MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette")
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25)