diff --git a/reference/spl/arrayobject.xml b/reference/spl/arrayobject.xml
index aa3b820a7dcd..39ade5351d5f 100644
--- a/reference/spl/arrayobject.xml
+++ b/reference/spl/arrayobject.xml
@@ -12,6 +12,11 @@
    <para>
     This class allows objects to work as arrays.
    </para>
+   <note>
+    <simpara>
+     This class is conceptionally flawed, and therefore its usage is discouraged.
+    </simpara>
+   </note>
   </section>
 <!-- }}} -->