diff --git a/api-ref/src/docbkx/ch_blockstorage-api-v2.xml b/api-ref/src/docbkx/ch_blockstorage-api-v2.xml
index cd7fc85ae..2cd73140b 100644
--- a/api-ref/src/docbkx/ch_blockstorage-api-v2.xml
+++ b/api-ref/src/docbkx/ch_blockstorage-api-v2.xml
@@ -333,6 +333,8 @@
         <para>In the event of an error, more information about the error
             can be found in the <literal>fail_reason</literal> field for
             the backup.</para>
+        <wadl:resources href="../wadls/volume-api/src/v2/volume-backups-api-v2.wadl"
+            xmlns:wadl="http://wadl.dev.java.net/2009/02"/>
     </section>
     <section xml:id="os-volume-manage-v2">
         <title>Volume manage extension (os-volume-manage)</title>