Fixes #9021

Change-Id: Id4465857c765342aa8c4b5bc2fdc06754a290025
Reviewed-on: https://go-review.googlesource.com/67530Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>