diff --git a/libs/midi++2/midi++/port.h b/libs/midi++2/midi++/port.h
index 4e63d41141..f16743337c 100644
--- a/libs/midi++2/midi++/port.h
+++ b/libs/midi++2/midi++/port.h
@@ -22,6 +22,10 @@
 #include <string>
 #include <iostream>
 
+#include <jack/types.h> /* XXX ... desirable to get rid of this but needed for
+			 * now due to use of JackPortIsXXXX
+			 */
+
 #include "pbd/xml++.h"
 #include "pbd/crossthread.h"
 #include "pbd/signals.h"