diff --git a/src/mame/drivers/exidy440.c b/src/mame/drivers/exidy440.c
index 782dc669bb7..ed0132b4e94 100644
--- a/src/mame/drivers/exidy440.c
+++ b/src/mame/drivers/exidy440.c
@@ -670,8 +670,9 @@ static INPUT_PORTS_START( catch22 )
 	PORT_START("IN3")		/* coin counters */
 	PORT_BIT( 0x01, IP_ACTIVE_LOW,  IPT_COIN1 ) PORT_CHANGED(coin_inserted, 0)
 	PORT_BIT( 0x02, IP_ACTIVE_LOW,  IPT_COIN2 ) PORT_CHANGED(coin_inserted, 0)
-	PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_UNKNOWN )
-	PORT_BIT( 0xf8, IP_ACTIVE_LOW,  IPT_UNKNOWN )
+	PORT_BIT( 0xfc, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	/* PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_UNKNOWN ) */ 
+	/* PORT_BIT( 0xf8, IP_ACTIVE_LOW,  IPT_UNKNOWN ) */
 
 	PORT_START("AN0")		/* fake analog X */
 	PORT_BIT( 0xff, 0x80, IPT_LIGHTGUN_X ) PORT_CROSSHAIR(X, 1.0, 0.0, 0) PORT_SENSITIVITY(50) PORT_KEYDELTA(10)