diff --git a/src/mame/drivers/vamphalf.c b/src/mame/drivers/vamphalf.c
index 9fff323a0b4..af6a67ecf10 100644
--- a/src/mame/drivers/vamphalf.c
+++ b/src/mame/drivers/vamphalf.c
@@ -493,7 +493,7 @@ static INPUT_PORTS_START( finalgdr )
 	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_UNKNOWN )
 	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_SERVICE1 )
 	PORT_SERVICE_NO_TOGGLE( 0x0080, IP_ACTIVE_LOW )
-	PORT_BIT( 0xff, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0xff00, IP_ACTIVE_LOW, IPT_UNKNOWN )
 INPUT_PORTS_END