diff --git a/src/mame/drivers/deco156.c b/src/mame/drivers/deco156.c
index ae461bff670..37bf227c0ea 100644
--- a/src/mame/drivers/deco156.c
+++ b/src/mame/drivers/deco156.c
@@ -206,12 +206,12 @@ static INPUT_PORTS_START( hvysmsh )
 	PORT_BIT( 0x00400000, IP_ACTIVE_LOW, IPT_UNUSED )
 	PORT_BIT( 0x00800000, IP_ACTIVE_LOW, IPT_UNUSED )
 	PORT_BIT( 0x01000000, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_READ_LINE_DEVICE_MEMBER("eeprom", eeprom_serial_93cxx_device, do_read)
-	PORT_BIT( 0x02000000, IP_ACTIVE_LOW, IPT_BUTTON5 ) PORT_PLAYER(1)
-	PORT_BIT( 0x04000000, IP_ACTIVE_LOW, IPT_BUTTON6 ) PORT_PLAYER(1)
+	PORT_BIT( 0x02000000, IP_ACTIVE_LOW, IPT_UNUSED ) //PORT_PLAYER(1)
+	PORT_BIT( 0x04000000, IP_ACTIVE_LOW, IPT_UNUSED ) //PORT_PLAYER(1)
 	PORT_BIT( 0x08000000, IP_ACTIVE_LOW, IPT_UNUSED )
-	PORT_BIT( 0x10000000, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_PLAYER(2)
-	PORT_BIT( 0x20000000, IP_ACTIVE_LOW, IPT_BUTTON5 ) PORT_PLAYER(2)
-	PORT_BIT( 0x40000000, IP_ACTIVE_LOW, IPT_BUTTON6 ) PORT_PLAYER(2)
+	PORT_BIT( 0x10000000, IP_ACTIVE_LOW, IPT_UNUSED ) //PORT_PLAYER(2)
+	PORT_BIT( 0x20000000, IP_ACTIVE_LOW, IPT_UNUSED ) //PORT_PLAYER(2)
+	PORT_BIT( 0x40000000, IP_ACTIVE_LOW, IPT_UNUSED ) //PORT_PLAYER(2)
 	PORT_BIT( 0x80000000, IP_ACTIVE_LOW, IPT_UNUSED )
 
 	PORT_START( "EEPROMOUT" )
@@ -248,12 +248,12 @@ static INPUT_PORTS_START( wcvol95 )
 	PORT_BIT( 0x00400000, IP_ACTIVE_LOW, IPT_UNUSED )
 	PORT_BIT( 0x00800000, IP_ACTIVE_LOW, IPT_UNUSED )
 	PORT_BIT( 0x01000000, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_READ_LINE_DEVICE_MEMBER("eeprom", eeprom_serial_93cxx_device, do_read)
-	PORT_BIT( 0x02000000, IP_ACTIVE_LOW, IPT_BUTTON5 ) PORT_PLAYER(1)
-	PORT_BIT( 0x04000000, IP_ACTIVE_LOW, IPT_BUTTON6 ) PORT_PLAYER(1)
+	PORT_BIT( 0x02000000, IP_ACTIVE_LOW, IPT_UNUSED ) //PORT_PLAYER(1)
+	PORT_BIT( 0x04000000, IP_ACTIVE_LOW, IPT_UNUSED ) //PORT_PLAYER(1)
 	PORT_BIT( 0x08000000, IP_ACTIVE_LOW, IPT_UNUSED )
-	PORT_BIT( 0x10000000, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_PLAYER(2)
-	PORT_BIT( 0x20000000, IP_ACTIVE_LOW, IPT_BUTTON5 ) PORT_PLAYER(2)
-	PORT_BIT( 0x40000000, IP_ACTIVE_LOW, IPT_BUTTON6 ) PORT_PLAYER(2)
+	PORT_BIT( 0x10000000, IP_ACTIVE_LOW, IPT_UNUSED ) //PORT_PLAYER(2)
+	PORT_BIT( 0x20000000, IP_ACTIVE_LOW, IPT_UNUSED ) //PORT_PLAYER(2)
+	PORT_BIT( 0x40000000, IP_ACTIVE_LOW, IPT_UNUSED ) //PORT_PLAYER(2)
 	PORT_BIT( 0x80000000, IP_ACTIVE_LOW, IPT_UNUSED )
 
 	PORT_START( "EEPROMOUT" )
@@ -374,7 +374,7 @@ static MACHINE_CONFIG_START( hvysmsh, deco156_state )
 	MCFG_DECO16IC_ADD("tilegen1", deco156_deco16ic_tilegen1_intf)
 	MCFG_DECO16IC_GFXDECODE("gfxdecode")
 	MCFG_DECO16IC_PALETTE("palette")
-	
+
 	MCFG_DEVICE_ADD("spritegen", DECO_SPRITE, 0)
 	decospr_device::set_gfx_region(*device, 2);
 	decospr_device::set_pri_callback(*device, deco156_pri_callback);
@@ -416,7 +416,7 @@ static MACHINE_CONFIG_START( wcvol95, deco156_state )
 	MCFG_DECO16IC_ADD("tilegen1", deco156_deco16ic_tilegen1_intf)
 	MCFG_DECO16IC_GFXDECODE("gfxdecode")
 	MCFG_DECO16IC_PALETTE("palette")
-	
+
 	MCFG_DEVICE_ADD("spritegen", DECO_SPRITE, 0)
 	decospr_device::set_gfx_region(*device, 2);
 	decospr_device::set_pri_callback(*device, deco156_pri_callback);