--- msn/util.cpp.orig	2013-01-06 19:48:17.552569211 -0500
+++ msn/util.cpp	2013-01-06 19:48:19.643520276 -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"