Thread:Extension talk:Nuke/fatal error undefined getUsers()

I'am using mediawiki ver 1.16.4, I just downloaded Nuke and put it into my extensions/ folder but when I go to the special page "Special:Nuke" get the following error:

Fatal error: Call to undefined method SpecialNuke::getUser in $IP/extensions/Nuke/Nuke_body.php on line 10