diff --git a/include/boost/move/detail/addressof.hpp b/include/boost/move/detail/addressof.hpp
index b425e6c..8679fa9 100644
--- a/include/boost/move/detail/addressof.hpp
+++ b/include/boost/move/detail/addressof.hpp
@@ -18,7 +18,7 @@
 #  pragma once
 #endif
 
-#include <cstddef>
+#include <boost/move/detail/workaround.hpp>
 
 namespace boost {
 namespace move_detail {
diff --git a/include/boost/move/detail/force_ptr.hpp b/include/boost/move/detail/force_ptr.hpp
index f9cfacc..3abed2d 100644
--- a/include/boost/move/detail/force_ptr.hpp
+++ b/include/boost/move/detail/force_ptr.hpp
@@ -18,7 +18,7 @@
 #  pragma once
 #endif
 
-#include <cstddef>
+#include <boost/move/detail/workaround.hpp>
 
 namespace boost {
 namespace move_detail {