wolfire wiki error

Internal error
Detected bug in an extension! Hook ReCaptcha::confirmEdit has invalid call signature; Parameter 1 to ReCaptcha::confirmEdit() expected to be a reference, value given
Backtrace:
#0 /var/www/wiki/includes/EditPage.php(831): wfRunHooks('EditFilter', Array)
#1 /var/www/wiki/includes/EditPage.php(2656): EditPage->internalAttemptSave(false, false)
#2 /var/www/wiki/includes/EditPage.php(415): EditPage->attemptSave()
#3 /var/www/wiki/includes/EditPage.php(296): EditPage->edit()
#4 /var/www/wiki/includes/Wiki.php(522): EditPage->submit()
#5 /var/www/wiki/includes/Wiki.php(69): MediaWiki->performAction(Object(OutputPage), Object(Article), Object(Title), Object(User), Object(WebRequest))
#6 /var/www/wiki/index.php(114): MediaWiki->performRequestForTitle(Object(Title), Object(Article), Object(OutputPage), Object(User), Object(WebRequest))
#7 {main}