Did not keep Nafil Roza after having intent to keep it

Peace be upon you, Last night before I had slept I Made Intention to keep nafil Roza on the 1st day of Dhu Al-Hijjah. I said it to Allah that I intent to keep. But I woke late for Fajar and then I did not keep my fast. Is having intention to fast and then not keeping a sin and needs to be compensated in this case of nafil roza.