diff -up ppc64-diag-2.4.2/ela/add_regex.cpp.unistd ppc64-diag-2.4.2/ela/add_regex.cpp
--- ppc64-diag-2.4.2/ela/add_regex.cpp.unistd	2012-02-15 18:30:39.940068887 +0100
+++ ppc64-diag-2.4.2/ela/add_regex.cpp	2012-02-15 18:29:58.710066673 +0100
@@ -1,6 +1,7 @@
 using namespace std;
 
 #include <stdlib.h>
+#include <unistd.h>
 #include <iostream>
 #include "catalogs.h"