diff --git a/src/emu/bus/midi/midi.c b/src/emu/bus/midi/midi.c
index 5021f82f440..d040f2d606b 100644
--- a/src/emu/bus/midi/midi.c
+++ b/src/emu/bus/midi/midi.c
@@ -26,6 +26,7 @@ midi_port_device::~midi_port_device()
 void midi_port_device::device_config_complete()
 {
 	m_dev = dynamic_cast<device_midi_port_interface *>(get_card_device());
+	m_dev->set_my_port_device(this);
 }
 
 void midi_port_device::device_start()
@@ -38,3 +39,4 @@ WRITE_LINE_MEMBER( midi_port_device::write_txd )
 	if(m_dev)
 		m_dev->input_txd(state);
 }
+
diff --git a/src/emu/bus/midi/midi.h b/src/emu/bus/midi/midi.h
index 7b386ac9de4..a8b74212e89 100644
--- a/src/emu/bus/midi/midi.h
+++ b/src/emu/bus/midi/midi.h
@@ -51,6 +51,8 @@ public:
 	virtual DECLARE_WRITE_LINE_MEMBER( input_txd ) {}
 	DECLARE_WRITE_LINE_MEMBER( output_rxd ) { m_port->m_rxd = state; m_port->m_rxd_handler(state); }
 
+	void set_my_port_device(midi_port_device *parent) { m_port = parent; }
+
 protected:
 	midi_port_device *m_port;
 };