In 948, Fanna Khusraw was chosen by his uncle Imad al-Dawla as his successor because he had no heir. Imad al-Dawla died in December 949, and thus Fanna Khusraw became the new ruler of Fars. However, this appointment was not accepted by a group of Daylamite officers, who shortly rebelled against Fanna Khusraw. Rukn al-Dawla quickly left for southern Iran to save his son, and was joined by the "vizier" of Mu'izz al-Dawla for the same purpose. Together they defeated the rebels and put Fanna Khusraw on the throne in Shiraz. Fanna Khusraw then requested the title of "Taj al-Dawla" (Crown of the state) from the Abbasid caliph. However, to Mu'izz al-Dawla, the title of "Taj" ("crown") implied that Fanna Khusraw was the superior ruler of the Buyid Empire, provoking a reaction from him, and making him decline Fanna Khusraw's request. A more suitable title ("Adud al-Dawla") ("Pillar of the Abbasid dynasty") was instead chosen. Adud al-Dawla was only thirteen when he was crowned as the ruler of Fars, and was educated there by his tutor Abu 'l-Fadl ibn al-'Amid.