 On 31 August 2016, Ronny and director of football Michael Preetz mutually agreed to terminate the former's contract one year in advance, after he became surplus to requirements under head coach Pál Dárdai.On 17 March 2017, more than one decade after leaving for Europe, 30-year-old Ronny returned to his homeland and signed with local Fortaleza Esporte Clube, choosing to wear jersey number 52 as an homage to his father Caetano, who had that age at the time and was also a footballer.Alongside seven other players, he left the club on 10 November.