diff --git a/src/mame/drivers/dynax.c b/src/mame/drivers/dynax.c
index 16063eeda08..f78e19f8507 100644
--- a/src/mame/drivers/dynax.c
+++ b/src/mame/drivers/dynax.c
@@ -2015,8 +2015,8 @@ static INPUT_PORTS_START( cdracula )
 	PORT_START("P1")
 	PORT_BIT(  0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(1)
 	PORT_BIT(  0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(1)
-	PORT_BIT(  0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
-	PORT_BIT(  0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT(  0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(1)
+	PORT_BIT(  0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(1)
 	PORT_BIT(  0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(1)
 	PORT_BIT(  0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )  // same as button1
 	PORT_BIT(  0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )
@@ -2025,8 +2025,8 @@ static INPUT_PORTS_START( cdracula )
 	PORT_START("P2")
 	PORT_BIT(  0x01, IP_ACTIVE_LOW, IPT_JOYSTICK_UP ) PORT_PLAYER(2)
 	PORT_BIT(  0x02, IP_ACTIVE_LOW, IPT_JOYSTICK_DOWN ) PORT_PLAYER(2)
-	PORT_BIT(  0x04, IP_ACTIVE_LOW, IPT_UNKNOWN )
-	PORT_BIT(  0x08, IP_ACTIVE_LOW, IPT_UNKNOWN )
+	PORT_BIT(  0x04, IP_ACTIVE_LOW, IPT_JOYSTICK_LEFT ) PORT_PLAYER(2)
+	PORT_BIT(  0x08, IP_ACTIVE_LOW, IPT_JOYSTICK_RIGHT ) PORT_PLAYER(2)
 	PORT_BIT(  0x10, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_PLAYER(2)
 	PORT_BIT(  0x20, IP_ACTIVE_LOW, IPT_UNKNOWN )  // same as button1
 	PORT_BIT(  0x40, IP_ACTIVE_LOW, IPT_UNKNOWN )