 Despite the ten-year truce of 689, war with Byzantium resumed following Abd al-Malik's victory against Ibn al-Zubayr in 692.The decision to resume hostilities was taken by Emperor Justinian II, ostensibly because of his refusal to accept payment of the tribute in the Muslim currency introduced that year rather than the Byzantine "nomisma" (see below).This is reported solely by Theophanes and issues of chronology make this suspect; not all modern scholars accept its veracity.