diff --git a/libs/ardour/midi_ui.cc b/libs/ardour/midi_ui.cc
index 78da32e427..82261b58ec 100644
--- a/libs/ardour/midi_ui.cc
+++ b/libs/ardour/midi_ui.cc
@@ -104,7 +104,9 @@ MidiControlUI::midi_input_handler (IOCondition ioc, MIDI::Port* port)
 
 	if (ioc & IO_IN) {
 
+#ifndef WIN32
 		CrossThreadChannel::drain (port->selectable());
+#endif
 
 		DEBUG_TRACE (DEBUG::MidiIO, string_compose ("data available on %1\n", port->name()));
 		framepos_t now = _session.engine().frame_time();
diff --git a/libs/midi++2/jack_midi_port.cc b/libs/midi++2/jack_midi_port.cc
index 57ca2b3629..3220ca5b55 100644
--- a/libs/midi++2/jack_midi_port.cc
+++ b/libs/midi++2/jack_midi_port.cc
@@ -58,7 +58,9 @@ JackMIDIPort::JackMIDIPort (string const & name, Flags flags, jack_client_t* jac
 	, _last_write_timestamp (0)
 	, output_fifo (512)
 	, input_fifo (1024)
+#ifndef WIN32
 	, xthread (true)
+#endif
 {
 	assert (jack_client);
 	init (name, flags);
@@ -73,7 +75,9 @@ JackMIDIPort::JackMIDIPort (const XMLNode& node, jack_client_t* jack_client)
 	, _last_write_timestamp (0)
 	, output_fifo (512)
 	, input_fifo (1024)
+#ifndef WIN32
 	, xthread (true)
+#endif
 {
 	assert (jack_client);
 
@@ -170,7 +174,9 @@ JackMIDIPort::cycle_start (pframes_t nframes)
 		}	
 		
 		if (event_count) {
+#ifndef WIN32
 			xthread.wakeup ();
+#endif
 		}
 	}
 }
diff --git a/libs/midi++2/midi++/jack_midi_port.h b/libs/midi++2/midi++/jack_midi_port.h
index a8859387a4..f91c7dab83 100644
--- a/libs/midi++2/midi++/jack_midi_port.h
+++ b/libs/midi++2/midi++/jack_midi_port.h
@@ -57,7 +57,13 @@ class JackMIDIPort : public Port {
 	int write (const byte *msg, size_t msglen, timestamp_t timestamp);
 	int read (byte *buf, size_t bufsize);
 	void drain (int check_interval_usecs);
-	int selectable () const { return xthread.selectable(); }
+	int selectable () const {
+#ifdef WIN32
+		return false;
+#else
+		return xthread.selectable();
+#endif
+	}
 
 	pframes_t nframes_this_cycle() const { return _nframes_this_cycle; }
 
@@ -80,7 +86,9 @@ private:
 	RingBuffer< Evoral::Event<double> > output_fifo;
 	Evoral::EventRingBuffer<timestamp_t> input_fifo;
         Glib::Threads::Mutex output_fifo_lock;
+#ifndef WIN32
 	CrossThreadChannel xthread;
+#endif
 
 	int create_port ();
 
diff --git a/libs/midi++2/midi++/port.h b/libs/midi++2/midi++/port.h
index 439760115c..d4f03b593e 100644
--- a/libs/midi++2/midi++/port.h
+++ b/libs/midi++2/midi++/port.h
@@ -27,7 +27,9 @@
 #include <pthread.h>
 
 #include "pbd/xml++.h"
+#ifndef WIN32
 #include "pbd/crossthread.h"
+#endif
 #include "pbd/signals.h"
 #include "pbd/ringbuffer.h"