FATAL logging via SLF4J is written as ERROR on EAP 6

Issue

We have our messages being sent out when the log level is FATAL.

if (log.isErrorEnabled()) {
    log.error("ERROR message logged");
}
if (log.isFatalEnabled()) {
    log.fatal("FATAL message logged");
}

Results in

ERROR [example.Category] (Thread-2) ERROR message logged
ERROR [example.Category] (Thread-2) FATAL message logged