On 10 August 1961, he stripped his eldest son Tunku Mahmood Iskandar, of the post of Tunku Mahkota due to misconduct–although he was given the post of Raja Muda on 1 December 1966. His second son, Tunku Abdul Rahman (1933–1989) became the Tunku Mahkota instead. However, shortly before his death in April 1981, Sultan Ismail reappointed Tunku Iskandar as the Tunku Mahkota, who succeeded him the following month.[15]