Unable to open env file: /etc/default/locale: No such file or directory

I came across an error today when reviewing my daily Logwatch email, I found the following error:

CRON: pam_env(cron:session): Unable to open env file: /etc/default/locale: No such file or directory: 73 Time(s)

Researching further I found this to be a bug (Ubuntu Bug 155794), I tried the fix suggest and this worked.

sudo update-locale