Fix build breakage due to missing function definition

Change-Id: If0448fd7a60bec99e591b7de85173f2a641540cf
Reviewed-on: http://review.couchbase.org/37359
Reviewed-by: abhinav dangeti <abhinav@couchbase.com>
Tested-by: abhinav dangeti <abhinav@couchbase.com>