diff --git a/src/mame/drivers/galaxian.c b/src/mame/drivers/galaxian.c
index 9d92e4b41e5..83481bf31af 100644
--- a/src/mame/drivers/galaxian.c
+++ b/src/mame/drivers/galaxian.c
@@ -5168,7 +5168,7 @@ static MACHINE_CONFIG_DERIVED( zigzag, galaxian_base )
 	MCFG_CPU_PROGRAM_MAP(galaxian_map_base)  /* no discrete sound */
 
 	/* sound hardware */
-	MCFG_SOUND_ADD("8910.0", AY8910, 1789750)
+	MCFG_SOUND_ADD("8910.0", AY8910, GALAXIAN_PIXEL_CLOCK/3/2) /* matches PCB video - unconfirmed */
 	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
 MACHINE_CONFIG_END