Index: libevocosm-4.0.2/libevocosm/evocosm.h
===================================================================
--- libevocosm-4.0.2.orig/libevocosm/evocosm.h	2011-07-24 01:30:42.000000000 +0000
+++ libevocosm-4.0.2/libevocosm/evocosm.h	2012-04-17 05:34:29.707991602 +0000
@@ -61,6 +61,8 @@
 #include <omp.h>
 #endif
 
+#include <unistd.h>
+
 // Standard C++ library
 #include <vector>