diff --git a/doc/src/sgml/ref/delete.sgml b/doc/src/sgml/ref/delete.sgml
index 74ea907..0236a52 100644
--- a/doc/src/sgml/ref/delete.sgml
+++ b/doc/src/sgml/ref/delete.sgml
@@ -128,7 +128,8 @@ DELETE FROM [ ONLY ] <replaceable class="PARAMETER">table_name</replaceable> [ *
       <command>SELECT</command> statement; for example, an alias for
       the table name can be specified.  Do not repeat the target table
       in the <replaceable class="PARAMETER">using_list</replaceable>,
-      unless you wish to set up a self-join.
+      unless you wish to set up a self-join (in which case it must appear
+      with an alias in the <replaceable class="PARAMETER">using_list</replaceable>).
      </para>
     </listitem>
    </varlistentry>