diff --git a/src/mame/drivers/roul.c b/src/mame/drivers/roul.c
index b5c1a881d38..47679600b75 100644
--- a/src/mame/drivers/roul.c
+++ b/src/mame/drivers/roul.c
@@ -136,7 +136,7 @@ static MACHINE_DRIVER_START( roul )
 	MDRV_SCREEN_FORMAT(BITMAP_FORMAT_INDEXED16)
 	MDRV_SCREEN_REFRESH_RATE(60)
 	MDRV_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(0))
-	MDRV_SCREEN_SIZE(64*8, 32*8)
+	MDRV_SCREEN_SIZE(32*8, 32*8)
 	MDRV_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 0*8, 32*8-1)
 
 	MDRV_PALETTE_LENGTH(0x100)