What does decolonising the curriculum (DtC) entail and is it possible in the current context? I distinguish between a thick and thin idea of DtC. Thick DtC acknowledges that alternative knowledge systems exist, other than our western view of knowledge as 'justified true belief'. Thick DtC calls for recognition of epistemic injustice to indigenous people when their culture is downgraded as inferior, which may amount to epistemicide (De Sousa Santos). The language of colonisation plays a part in this process. Adopting the colonisers' language can distort indigenous knowledge. Thin DtC is where minor modifications are made to curriculum content to include contributions of indigenous minorities and racialized people and/or an acknowledgement of the wrongs done to colonised people. While thin DtC is to be welcomed, it is not sufficiently radical to combat the wrongs done in repressing or ignoring indigenous knowledge systems and therefore cannot compensate for epistemic injustice.