diff --git a/src/mame/drivers/tmnt.c b/src/mame/drivers/tmnt.c
index bf2714c1a72..b90790345eb 100644
--- a/src/mame/drivers/tmnt.c
+++ b/src/mame/drivers/tmnt.c
@@ -2255,7 +2255,7 @@ static MACHINE_CONFIG_START( blswhstl, tmnt_state )
 	MCFG_SCREEN_REFRESH_RATE(60)
 	MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500) /* not accurate */)
 	MCFG_SCREEN_SIZE(64*8, 32*8)
-	MCFG_SCREEN_VISIBLE_AREA(14*8, (64-15)*8-1, 2*8, 30*8-1 )
+	MCFG_SCREEN_VISIBLE_AREA(12*8, (64-12)*8-1, 2*8, 30*8-1 )
 	MCFG_SCREEN_UPDATE_DRIVER(tmnt_state, screen_update_lgtnfght)
 	MCFG_SCREEN_VBLANK_DRIVER(tmnt_state, screen_eof_blswhstl)
 	MCFG_SCREEN_PALETTE("palette")