diff --git a/src/mame/drivers/psikyosh.cpp b/src/mame/drivers/psikyosh.cpp
index 8656709d4fb..225734bed6e 100644
--- a/src/mame/drivers/psikyosh.cpp
+++ b/src/mame/drivers/psikyosh.cpp
@@ -802,12 +802,11 @@ static MACHINE_CONFIG_START( psikyo3v1, psikyosh_state )
 
 
 	/* sound hardware */
-	MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
+	MCFG_SPEAKER_STANDARD_MONO("mono")
 
 	MCFG_SOUND_ADD("ymf", YMF278B, MASTER_CLOCK/2)
 	MCFG_YMF278B_IRQ_HANDLER(INPUTLINE("maincpu", 12))
-	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 1.0)
-	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 1.0)
+	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
 MACHINE_CONFIG_END
 
 static MACHINE_CONFIG_DERIVED( psikyo5, psikyo3v1 )