Fixes #14772

Change-Id: I32f2b6b74de28be406b1306364bc07620a453962
Reviewed-on: https://go-review.googlesource.com/20680


Reviewed-by: David du Colombier <0intro@gmail.com>
Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>