diff --git a/ontology/saref4auto.ttl b/ontology/saref4auto.ttl
index e1397c47f8b9bf6733b1091666f9ffbba8199b82..309261b7ed6cc5051fc5050ddb344ec923b4a766 100644
--- a/ontology/saref4auto.ttl
+++ b/ontology/saref4auto.ttl
@@ -2162,11 +2162,11 @@ s4syst:System rdf:type owl:Class ;
           rdfs:label "trailing"@en .
 
 
-###  https://saref.etsi.org/saref4auto/unknown
-:Unknown rdf:type owl:NamedIndividual ,
+###  https://saref.etsi.org/saref4auto/UnknownPlatoonRole
+:UnknownPlatoonRole rdf:type owl:NamedIndividual ,
                   :PlatoonRole ;
          rdfs:comment "A type of platoon role"@en ;
-         rdfs:label "unknown"@en .
+         rdfs:label "unknown platoon role"@en .
 
 
 ###  Generated by the OWL API (version 4.5.9.2019-02-01T07:24:44Z) https://github.com/owlcs/owlapi