2016/applicative: fix the build

Updates golang/go#11811

Change-Id: I148208e9e71a3bb86751287bd46ab64c351e89d0
Reviewed-on: https://go-review.googlesource.com/24944
Reviewed-by: Parker Moore <parkrmoore@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
3 files changed