diff -wbBur libpqxx-3.1/include/pqxx/compiler-internal.hxx libpqxx-3.1.my/include/pqxx/compiler-internal.hxx
--- libpqxx-3.1/include/pqxx/compiler-internal.hxx	2010-02-16 02:21:36.000000000 +0300
+++ libpqxx-3.1.my/include/pqxx/compiler-internal.hxx	2011-11-21 15:56:00.000000000 +0400
@@ -18,6 +18,7 @@
 #ifndef PQXX_H_COMPILER_INTERNAL
 #define PQXX_H_COMPILER_INTERNAL
 
+#include <cstddef>
 
 // Workarounds & definitions needed to compile libpqxx into a library
 #include "pqxx/config-internal-compiler.h"