Fixes #25707

Change-Id: Idfa379db8cc0e105ea68455ec0b4a0dbc1b3f485
Reviewed-on: https://go-review.googlesource.com/c/153827
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>