diff --git a/src/mame/drivers/seattle.cpp b/src/mame/drivers/seattle.cpp
index fabd9054270..f800767931f 100644
--- a/src/mame/drivers/seattle.cpp
+++ b/src/mame/drivers/seattle.cpp
@@ -1488,6 +1488,8 @@ static INPUT_PORTS_START( sfrush )
 	PORT_MODIFY("SYSTEM")
 	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_START1 ) PORT_NAME("Abort")
 	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON11 ) PORT_NAME("Reverse")
+	PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_UNUSED )
+	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_UNUSED )
 
 	PORT_MODIFY("IN1")
 	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_BUTTON8 ) PORT_NAME("View 1")
@@ -1499,7 +1501,9 @@ static INPUT_PORTS_START( sfrush )
 	PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_BUTTON15 ) PORT_NAME("Track 3")
 	PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_BUTTON16 ) PORT_NAME("Track 4")
 	PORT_BIT( 0x0f00, IP_ACTIVE_LOW, IPT_CUSTOM) PORT_CUSTOM_MEMBER(seattle_state, gearshift_r)
-	PORT_BIT( 0xe000, IP_ACTIVE_LOW, IPT_UNUSED )
+	PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_VOLUME_UP )
+	PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_VOLUME_DOWN )
+	PORT_BIT( 0xc000, IP_ACTIVE_LOW, IPT_UNUSED )
 
 	PORT_START("GEAR")
 	PORT_BIT( 0x1, IP_ACTIVE_HIGH, IPT_BUTTON4 ) PORT_NAME("1st Gear")