diff --git a/include/xo/alloc2/AllocHeader.hpp b/include/xo/alloc2/AllocHeader.hpp
deleted file mode 100644
index ec99f59..0000000
--- a/include/xo/alloc2/AllocHeader.hpp
+++ /dev/null
@@ -1,28 +0,0 @@
-/** @file AllocHeader.hpp
- *
- *  @author Roland Conybeare, Dec 2025
- **/
-
-#pragma once
-
-#include <type_traits>
-#include <cstdint>
-#include <cstddef>
-
-namespace xo {
-    namespace mm {
-        struct AllocHeader {
-            using repr_type = std::uintptr_t;
-            using size_type = std::size_t;
-
-            explicit AllocHeader(repr_type x) : repr_{x} {}
-
-            repr_type repr_;
-        };
-
-        static_assert(sizeof(AllocHeader) == sizeof(AllocHeader::repr_type));
-        static_assert(std::is_standard_layout_v<AllocHeader>);
-    }
-}
-
-/* end AllocHeader.hpp */