diff --git a/src/mame/drivers/cps1.c b/src/mame/drivers/cps1.c
index 0e4599e6851..4ac311dcd05 100644
--- a/src/mame/drivers/cps1.c
+++ b/src/mame/drivers/cps1.c
@@ -2266,7 +2266,6 @@ static INPUT_PORTS_START( dino )
 	PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_OUTPUT ) PORT_WRITE_LINE_DEVICE("eeprom", eeprom_write_bit)
 	PORT_BIT( 0x40, IP_ACTIVE_HIGH, IPT_OUTPUT ) PORT_WRITE_LINE_DEVICE("eeprom", eeprom_set_clock_line)
 	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_OUTPUT ) PORT_WRITE_LINE_DEVICE("eeprom", eeprom_set_cs_line)
-	PORT_BIT( 0x3e, IP_ACTIVE_LOW, IPT_UNUSED )
 INPUT_PORTS_END
 
 /* Needs further checking */