diff --git a/api-ref/src/docbkx/ch_compute-v2.1.xml b/api-ref/src/docbkx/ch_compute-v2.1.xml
index af1fd5852..2a7554caf 100644
--- a/api-ref/src/docbkx/ch_compute-v2.1.xml
+++ b/api-ref/src/docbkx/ch_compute-v2.1.xml
@@ -587,6 +587,15 @@
          href="../wadls/compute-api/src/v2.1/wadl/os-assisted-volume-snapshots-v2.1.wadl"
          xmlns:wadl="http://wadl.dev.java.net/2009/02"/>
    </section>
+   <section xml:id="os-attach-interfaces-v2.1">
+      <title>Attach Interfaces (os-attach-interfaces)</title>
+      <para>
+         Creates, lists, gets details for, and deletes port interfaces.
+      </para>
+      <wadl:resources
+         href="../wadls/compute-api/src/v2.1/wadl/os-attach-interfaces-v2.1.wadl"
+         xmlns:wadl="http://wadl.dev.java.net/2009/02"/>
+   </section>
    <section xml:id="os-availability-zone-v2.1">
       <title>Availability zones (os-availability-zone)</title>
       <para>