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-rw-r--r--src/mame/drivers/expro02.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/expro02.cpp b/src/mame/drivers/expro02.cpp
index 9920572e602..73e274ef6af 100644
--- a/src/mame/drivers/expro02.cpp
+++ b/src/mame/drivers/expro02.cpp
@@ -950,7 +950,7 @@ MACHINE_CONFIG_START(expro02_state::expro02)
MCFG_WATCHDOG_TIME_INIT(attotime::from_seconds(3)) /* a guess, and certainly wrong */
/* sound hardware */
- MCFG_SPEAKER_STANDARD_MONO("mono")
+ SPEAKER(config, "mono").front_center();
MCFG_DEVICE_ADD("oki", OKIM6295, 12000000/6, okim6295_device::PIN7_LOW)
MCFG_DEVICE_ADDRESS_MAP(0, oki_map)