--- src/gnome-ppp-details.c	2005-05-04 01:26:25.000000000 +0300
+++ src/gnome-ppp-details.c	2007-04-14 13:28:30.000000000 +0300
@@ -31,6 +31,7 @@
  *    Joe Marcus Clarke  <marcus@freebsd.org>
  */
 
+#include <unistd.h>
 #include "gnome-ppp.h"