The Papuan language Kalamang has an adnominal demonstrative opa, which marks referents that are cognitively accessible either because they are common ground or because they are previously mentioned in the discourse. It is mainly an endophoric demonstrative which has tracking and recognitional uses, but it can be used exophorically as well. It can be used for both maintaining and reintroducing referents. The demonstrative opa is co-lexified with a time adverb opa ‘just now; earlier’. A grammaticalisation path cannot be established, but similar co-lexifications are found in Bunaq (Timor-Alor-Pantar) and Indonesian (Austronesian).