Fixes #27085

Change-Id: I4eb3ff7c76e0b8e4d8fe0298f739b0284d74a031
Reviewed-on: https://go-review.googlesource.com/130855Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>