diff -ruN kvpnc-0.9.6a-kde4.orig/src/kvpnc.cpp kvpnc-0.9.6a-kde4/src/kvpnc.cpp
--- kvpnc-0.9.6a-kde4.orig/src/kvpnc.cpp	2012-06-25 22:16:25.395420711 +0200
+++ kvpnc-0.9.6a-kde4/src/kvpnc.cpp	2012-06-25 22:17:41.598424971 +0200
@@ -75,6 +75,7 @@
 #include <cstdlib>
 #include <ctime>
 #include <iomanip>
+#include <unistd.h>
 
 #include "ui_mainviewbase4.h"
 #include "ciscocertificateenrollment.h"