diff --git a/src/mame/drivers/gameking.cpp b/src/mame/drivers/gameking.cpp
index 7d0a834cf27..5ce29c1af9e 100644
--- a/src/mame/drivers/gameking.cpp
+++ b/src/mame/drivers/gameking.cpp
@@ -103,9 +103,9 @@ static INPUT_PORTS_START( gameking )
 	PORT_START("JOY")
 	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START) PORT_NAME("Start")
 	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_SELECT) PORT_NAME("Select") //?
-	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON2) PORT_NAME("A") //?
+	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_BUTTON2) PORT_NAME("A")
 	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON1) PORT_NAME("B")
-	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) //?
+	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT )
 	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) //?
 	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN )
 	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_JOYSTICK_UP)