diff --git a/release/doc/en_US.ISO8859-1/relnotes/article.xml b/release/doc/en_US.ISO8859-1/relnotes/article.xml
index 8be8c006f97..5c261d6bf2c 100644
--- a/release/doc/en_US.ISO8859-1/relnotes/article.xml
+++ b/release/doc/en_US.ISO8859-1/relnotes/article.xml
@@ -1014,6 +1014,11 @@
 	Release Engineering build tools have been updated to include
 	support for producing virtual machine disk images for various
 	cloud hosting providers.</para>
+
+      <para revision="278926">The Release Engineering build tools have
+	been updated to use multi-threaded &man.xz.1;.  By default,
+	the number of &man.xz.1; threads is set to the number of cores
+	available.</para>
     </sect2>
   </sect1>
 </article>