--- a/lib/refcounted.h	2012-10-18 11:37:55.322732178 -0300
+++ a/lib/refcounted.h	2012-10-18 11:40:10.303349659 -0300
@@ -29,6 +29,7 @@ 
 #define MYSQLPP_REFCOUNTED_H
 
 #include <memory>
+#include <cstddef>
 
 namespace mysqlpp {