<versioning /> element not parsed with new Parser

A user complaint:

I needed to enable versioning. Looking at http://docs.jboss.org/infinispan/5.1/apidocs/config.html#ce_default_versioning I tried to add

<versioning versioningScheme="SIMPLE" enabled="true" />

to the <default> section in the configuration file, but apparently I'm doing something wrong, because then I get this exception from the parser:

Caused by: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[35,5]
Message: Unexpected element 'versioning' encountered