IS research often focuses on the contributions of information systems to organizational productivity. The task-technology fit theory proposes a positive contribution to performance when there is a good fit between the technology and the task. The fit appropriation model further proposes that the relationship between fit and performance is moderated by the user’s appropriation of the technology. This research extends these theories by investigating the role of adaptation in the fit between task and technology. Prior research has modeled adaptation as a single construct encompassing task, technology and the individual, which does not allow for an understanding of the relationship among these items. We propose that adaptation should be measured as two distinct constructs. We develop and validate a scale to measure task adaptation and technology adaption and find support for task adaption as a mediator of the effects of technology adaptation on performance.