diff --git a/src/drivers/kaneko16.c b/src/drivers/kaneko16.c
index ec5abc10..d05b657e 100644
--- a/src/drivers/kaneko16.c
+++ b/src/drivers/kaneko16.c
@@ -1130,12 +1130,14 @@ static ADDRESS_MAP_START( wingforc_sound_writemem, ADDRESS_SPACE_PROGRAM, 8 )
 ADDRESS_MAP_END
 
 static ADDRESS_MAP_START( wingforc_sound_readport, ADDRESS_SPACE_IO, 8 )
+	ADDRESS_MAP_FLAGS( AMEF_ABITS(8) )
 	AM_RANGE(0x03, 0x03) AM_READ(YM2151_status_port_0_r	)
 	AM_RANGE(0x0a, 0x0a) AM_READ(OKIM6295_status_0_r)
 	AM_RANGE(0x06, 0x06) AM_READ(soundlatch_r				)
 ADDRESS_MAP_END
 
 static ADDRESS_MAP_START( wingforc_sound_writeport, ADDRESS_SPACE_IO, 8 )
+	ADDRESS_MAP_FLAGS( AMEF_ABITS(8) )
 	AM_RANGE(0x02, 0x02) AM_WRITE(YM2151_register_port_0_w	)
 	AM_RANGE(0x03, 0x03) AM_WRITE(YM2151_data_port_0_w		)
 	AM_RANGE(0x0a, 0x0a) AM_WRITE(OKIM6295_data_0_w			)
@@ -2537,6 +2539,7 @@ static MACHINE_DRIVER_START( wingforc )
 	MDRV_SOUND_ADD(OKIM6295, 16000000/16/132)
 	MDRV_SOUND_CONFIG(okim6295_interface_region_1)
 	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
+	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
 MACHINE_DRIVER_END