Fixes #24425

Change-Id: I2aacbced8cd14da67fe9a4cbd62b434c18b5fce2
Reviewed-on: https://go-review.googlesource.com/101215
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>