Sending bash history to syslog

Bash version 4.N has apparently the ability to write command-history to syslog, but I can't find information about how to configure this. I have read several pages which offer hacks using the PROMPT_COMMAND, and trap, and I know that there's a patch available, but this should be unnecessary, as it is now built in. I know I can use auditd to capture commands, but I'd like to use the bash/syslog combination.