Follows up CL 605355
Fixes #68863

Change-Id: I56e05822502e66eed610d5e924d110607ce146b5
Reviewed-on: https://go-review.googlesource.com/c/go/+/606135


Reviewed-by: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Andy Pan <panjf2000@gmail.com>