--- libmsn-4.2.orig/msn/util.cpp	2009-07-22 19:57:10.000000000 +0000
+++ libmsn-4.2/msn/util.cpp	2012-04-16 20:52:18.068767213 +0000
@@ -25,6 +25,7 @@
 #include <msn/util.h>
 #include <sstream>
 #include <errno.h>
+#include <unistd.h>
 #include <cctype>
 #include <fstream>
 #include <openssl/rand.h>