--- ./msn/util.cpp.orig	2009-07-22 14:57:10.000000000 -0500
+++ ./msn/util.cpp	2012-04-05 10:45:40.604000070 -0500
@@ -30,6 +30,7 @@
 #include <openssl/rand.h>
 #include <cstring>
 #include <sys/timeb.h>
+#include <unistd.h>
 #include "md5.h"
 #include "libsiren/siren7.h"