Fixes #20054

Change-Id: I3c660ca0c56cdde2c2ac2f6a666d8531ab5588c5
Reviewed-on: https://go-review.googlesource.com/49050
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>