* Jack 2 _jack arg is not used so it should be OK
*/
-#ifdef USING_JACK2_EXPANSION_OF_JACK_API
+#if defined(USING_JACK2_EXPANSION_OF_JACK_API) || defined(WIN32)
if (jack_client_stop_thread (_jack, thread) != 0) {
error << "AudioEngine: cannot stop process thread" << endmsg;
return false;