diff -urN orig/pdns/backends/bind/zoneparser2.cc pdns-2.9.15/pdns/backends/bind/zoneparser2.cc
--- orig/pdns/backends/bind/zoneparser2.cc	Sat Jan 17 12:50:18 2004
+++ pdns-2.9.15/pdns/backends/bind/zoneparser2.cc	Tue Jan 20 21:57:00 2004
@@ -36,6 +36,7 @@
 #include "ahuexception.hh"
 #include "qtype.hh"
 #include <algorithm>
+#include <unistd.h>
 using namespace std;
 
 #include "zoneparser.hh"