6.1.5 Error Updating Web Application Firewall: php_value not allowed here

After updating to v6.1.5, Wordfence tells me it needs to update the .htaccess file. The update itself works (i.e. the .htaccess file is written), but I now get an error (and my site goes dark):

[Fri May 06 10:29:33 2016] [alert] [client ###.###.###.###] /is/htdocs/######/www/.htaccess: php_value not allowed here, referer: http://####/wp-admin/admin.php?page=WordfenceWAF&wafAction=configureAutoPrepend¤tAutoPrepend

I guess my web hoster does not like the .htaccess file to contain the php_value statement … anything I can do?

https://wordpress.org/plugins/wordfence/