diff --git a/macosx/coremidi/JackCoreMidiUtil.mm b/macosx/coremidi/JackCoreMidiUtil.mm
index a93a4658..8014f572 100644
--- a/macosx/coremidi/JackCoreMidiUtil.mm
+++ b/macosx/coremidi/JackCoreMidiUtil.mm
@@ -18,6 +18,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
 
 #include <sstream>
+#include <Foundation/Foundation.h>
 
 #include "JackError.h"
 #include "JackCoreMidiUtil.h"