diff --git a/src/mame/drivers/1945kiii.cpp b/src/mame/drivers/1945kiii.cpp
index 42fd7d2c29f..c770592f055 100644
--- a/src/mame/drivers/1945kiii.cpp
+++ b/src/mame/drivers/1945kiii.cpp
@@ -295,7 +295,7 @@ static INPUT_PORTS_START( flagrall )
 	PORT_START("SYSTEM")
 	PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_COIN1 )
 	PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_COIN2 )
-	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_START1 ) // needed to use the continue feature even if it's not used to start the game
 	PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_UNKNOWN )
 	PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_UNKNOWN )
 	PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_UNKNOWN )