--- src/data.h.orig	2014-02-15 07:56:30.407145042 -0800
+++ src/data.h	2014-02-15 07:57:16.238469278 -0800
@@ -16,6 +16,7 @@
 #ifndef DATA_H
 #define DATA_H
 
+#include <stddef.h>
 #include <vector>
 #include "constants.h"
 #include "version.h"