diff --git a/include/xo/alloc2/Arena.hpp b/include/xo/alloc2/Arena.hpp
new file mode 100644
index 0000000..fac3f30
--- /dev/null
+++ b/include/xo/alloc2/Arena.hpp
@@ -0,0 +1,17 @@
+/** @file Arena.hpp
+ *
+ *  @author Roland Conybeare, Feb 2026
+ **/
+
+#pragma once
+
+// reminder: we can't put this AAllocator
+// (or APrintable for that matter) support in xo-arena,
+// because xo-arena is a dependency of xo-facet, which is in turn
+// a dependency of xo-alloc2
+//
+
+#include <xo/arena/DArena.hpp>
+#include "arena/IAllocator_DArena.hpp"
+
+/* end Arena.hpp */