Fixes #19520

Change-Id: Ib0a1f0f2429172d2781c9b6fbd21f9cb8da1b8ed
Reviewed-on: https://go-review.googlesource.com/43295
Run-TryBot: Francesc Campoy Flores <campoy@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>