Fixes #23326

Change-Id: I6abc353ab004aadc6a4cbefbff3198f848640d7f
Reviewed-on: https://go-review.googlesource.com/87036
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>