diff --git a/src/mame/drivers/segas32.cpp b/src/mame/drivers/segas32.cpp
index 4ba45a8caf4..816fe716bcc 100644
--- a/src/mame/drivers/segas32.cpp
+++ b/src/mame/drivers/segas32.cpp
@@ -1579,6 +1579,7 @@ static INPUT_PORTS_START( f1en )
 
 	PORT_MODIFY("slavepcb:SERVICE12_A")
 	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED )
+	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_START2 )
 	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
 
 	PORT_MODIFY("slavepcb:SERVICE34_A")