diff --git a/docs/src/reference/docbook/index.xml b/docs/src/reference/docbook/index.xml
index 48119e0b..ec0600d1 100644
--- a/docs/src/reference/docbook/index.xml
+++ b/docs/src/reference/docbook/index.xml
@@ -15,7 +15,7 @@
       </author>
       <author>
         <firstname>Oliver</firstname>
-        <lastname>Gierke</lastname>
+        <surname>Gierke</surname>
         <affiliation>SpringSource, a division of VMware</affiliation>
       </author>
     </authorgroup>