--- source/main/fitness_matrix.hh.orig	Thu Apr 18 08:54:04 2002
+++ source/main/fitness_matrix.hh	Thu Apr 18 08:54:15 2002
@@ -7,6 +7,7 @@
 #include <vector>
 #include <map>
 #include <list>
+#include <sys/types.h>
 #include <sys/timeb.h>
 
 #include "../cpu/cpu.hh"