--- datetime/datetime.orig	2013-11-13 11:44:52.000000000 +0100
+++ datetime/datetime	2013-11-27 16:22:41.000000000 +0100
@@ -1,6 +1,10 @@
 #ifndef INCLUDED_BOBCAT_DATETIME_
 #define INCLUDED_BOBCAT_DATETIME_
 
+#ifdef __FreeBSD__
+#include <errno.h>
+#endif
+
 #include <ctime>
 #include <iosfwd>