Will I receive a 1099R form in 2016 or 2017 for this 401k loan early distribution since there is a 60 day grace period?

I quit my job in November 2015 and had a 401k loan that I still hadn't paid back when I left.  I understand there is a 60 day grace period to pay this back and if it's not paid back, I know it's considered a early distribution and I will be taxed on this and I should be receiving a 1099R form.  Since the date for after the 60 day grace period will put this at January 2016, will the early distribution be considered for 2015?  Will I receive a 1099 R form for this early distribution in 2016 or will this be considered a 2016 early distribution and I'll get the 1099 R form in 2017?