diff -ruN arpage/src/event_zone.cc new_arpage/src/event_zone.cc
--- arpage/src/event_zone.cc	2019-02-11 10:46:34.273065725 +0300
+++ new_arpage/src/event_zone.cc	2019-02-11 10:45:39.387317528 +0300
@@ -204,6 +204,7 @@
 midi_uninit( jack_client_t * jack_client ) {
    jack_client_close( jack_client );
    sleep(1);
+   return 0;
 }
 
 //-----------------------------------------------------------------------------
diff -ruN arpage/src/jack_process.cc new_arpage/src/jack_process.cc
--- arpage/src/jack_process.cc	2019-02-11 10:46:43.526769037 +0300
+++ new_arpage/src/jack_process.cc	2019-02-11 10:45:50.364321704 +0300
@@ -267,6 +267,7 @@
 midi_uninit( jack_client_t * jack_client ) {
    jack_client_close( jack_client );
    sleep(1);
+   return 0;
 }
 
 //-----------------------------------------------------------------------------