This article theorizes why Indigenous peoples’ security claims fail to be accepted by government authorities or incorporated into the security policies and practices of settler states. By engaging the concepts of securitization and ontological security, I explain how Indigenous peoples are unable to successfully “speak” security to the state. I argue that nondominant societal groups are unable to gain authoritative acceptance for security issues that challenge the dominant national identity. In effect, indigeneity acts an inhibiting condition for successful securitization because, by identifying the state and dominant society as the source of their insecurity, Indigenous peoples’ security claims challenge the ontological security of settler societies. Given the incommensurability of Indigenous and settler claims to authority over land, and the ontological relationship to land that underpins Indigenous identities and worldviews, the inhibiting condition is especially relevant with respect to security claims based on damage to the natural environment.