In Plan Conversion

My employer 401k plan allows for pre tax and Roth contributions as well. The pre tax and roth contribution combined limits are $19000. I DO NOT directly make any Roth contributions. I however, make post tax contributions to 401k (combined limits for all contributions are 50k) and then do the "in plan conversion" to Roth. I receive 1099-R for this conversion. Is this 1099-R reporting a rollover of funds from 401k plan to a "Designated Roth 401k" plan?