--- hydrogen-0.9.6/src/core/src/IO/portmidi_driver.cpp.orig	2012-05-25 14:19:45.000000000 +0200
+++ hydrogen-0.9.6/src/core/src/IO/portmidi_driver.cpp	2012-07-08 16:09:59.193699959 +0200
@@ -40,6 +40,7 @@
 #define TIME_START Pt_Start(1, 0, 0) /* timer started w/millisecond accuracy */
 
 #include <pthread.h>
+#include <unistd.h>
 
 namespace H2Core
 {