diff -Nur hugin-2011.4.0.orig/src/celeste/Utilities.cpp hugin-2011.4.0/src/celeste/Utilities.cpp
--- hugin-2011.4.0.orig/src/celeste/Utilities.cpp	2012-07-08 15:18:16.864454043 +0000
+++ hugin-2011.4.0/src/celeste/Utilities.cpp	2012-07-08 15:18:20.341089422 +0000
@@ -27,6 +27,7 @@
 
 #include <math.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include "Utilities.h"
 
 using namespace std;