diff --git a/docs/manual/src/docbook/cas-auth-provider.xml b/docs/manual/src/docbook/cas-auth-provider.xml
index 1aba677f45..cc0682cd56 100644
--- a/docs/manual/src/docbook/cas-auth-provider.xml
+++ b/docs/manual/src/docbook/cas-auth-provider.xml
@@ -233,7 +233,7 @@
         <para> <programlisting language="xml"><![CDATA[
 <security:http entry-point-ref="casEntryPoint">
    ...
-   <custom-filter position="CAS_FILTER" ref="casFilter" />
+   <security:custom-filter position="CAS_FILTER" ref="casFilter" />
 </security:http>
 
 <bean id="casFilter"