--- arpage-0.3.3/src/jack_process.cc	2010-05-17 21:08:11.000000000 +0100
+++ arpage-0.3.3.new/src/jack_process.cc	2012-01-08 23:30:01.662457371 +0000
@@ -24,6 +24,7 @@
 
 #include <iostream>
 #include <cstdio>
+#include <unistd.h>
 
 #define NOTE_ON  1
 #define NOTE_OFF 0