Fixes #9232.

Change-Id: I11a7fb7691d9e7473620db1b7fa29fec359c73d3
Reviewed-on: https://go-review.googlesource.com/9642Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>