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-rw-r--r--src/mame/drivers/gp_1.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/drivers/gp_1.cpp b/src/mame/drivers/gp_1.cpp
index 18fc0f6c5b3..bec1990b344 100644
--- a/src/mame/drivers/gp_1.cpp
+++ b/src/mame/drivers/gp_1.cpp
@@ -458,7 +458,7 @@ MACHINE_CONFIG_END
MACHINE_CONFIG_START(gp_1_state::gp_1s)
gp_1(config);
- MCFG_SPEAKER_STANDARD_MONO("mono")
+ SPEAKER(config, "mono").front_center();
MCFG_DEVICE_ADD("snsnd", SN76477)
MCFG_SN76477_NOISE_PARAMS(0, 0, 0) // noise + filter: N/C
MCFG_SN76477_DECAY_RES(0) // decay_res: N/C