Fix typo

Change-Id: I6c79ef02804c5d44782c3dbec8739e3e9bbb5d46
Reviewed-on: http://review.couchbase.org/33806
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>