diff --git a/ontology/uco-gufo.ttl b/ontology/uco-gufo.ttl
index 95b7c6a..c3db595 100644
--- a/ontology/uco-gufo.ttl
+++ b/ontology/uco-gufo.ttl
@@ -132,7 +132,12 @@ uco-core:startTime
 		;
 	.
 
+uco-identity:Identity
+	a gufo:Category ;
+	.
+
 uco-identity:Organization
+	a gufo:Kind ;
 	rdfs:subClassOf
 		drafting:Endurant ,
 		gufo:Object
@@ -140,6 +145,7 @@ uco-identity:Organization
 	.
 
 uco-identity:Person
+	a gufo:Kind ;
 	rdfs:subClassOf
 		drafting:Endurant ,
 		gufo:Object