In the late eighth century, Charlemagne issued a new kind of land grant in Septimania and the Spanish March to refugees fleeing Muslim Spain. This grant, the aprisio, was made from fiscal land in deserted areas and included special rights and immunities. Previous scholars have interpreted the aprisio in economic and military terms as a mechanism to entice settlers to the region in order to make the land productive and to provide warriors to defend the Frankish frontier. This article suggests that political concerns also may have played an important role, arguing that the aprisio grant was an attempt by Carolingian kings to limit the power exercised by very powerful marcher counts.