From 8d25b9ce544d8a8d9d784d6e4bf48e5d5608a6d1 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Fri, 6 Jun 2025 21:47:38 +0300
Subject: [PATCH] Add missing include

---
 include/boost/core/default_allocator.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/boost/core/default_allocator.hpp b/include/boost/core/default_allocator.hpp
index 91d3bbc..6640473 100644
--- a/include/boost/core/default_allocator.hpp
+++ b/include/boost/core/default_allocator.hpp
@@ -10,6 +10,7 @@ Distributed under the Boost Software License, Version 1.0.
 
 #include <boost/config.hpp>
 #include <new>
+#include <cstddef>
 
 namespace boost {