R1:ac0ad2e0161f

Fix typo in variable name

Summary: Follow-up to D8758.

Test Plan: Crossed fingers.

Reviewers: #blessed_reviewers, chad, epriestley

Reviewed By: #blessed_reviewers, chad, epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D8759