Faxdetect Options Wrong

When configuring DAHDI via DAHDI module I am trying to set fax detection under Global Settings

Correct options for chan_dahdi.conf are incoming, outgoing, both, no

However options from the module are incoming, outgoing, yes, no

yes is not a valid option, it needs to be both

; For fax detection, uncomment one of the following lines. The default is OFF
;
;faxdetect=both
;faxdetect=incoming
;faxdetect=outgoing
;faxdetect=no