diff --git a/src/cco-extensions/ModalRelationOntology.ttl b/src/cco-extensions/ModalRelationOntology.ttl
index 7819173..2647764 100644
--- a/src/cco-extensions/ModalRelationOntology.ttl
+++ b/src/cco-extensions/ModalRelationOntology.ttl
@@ -1110,7 +1110,7 @@ mro:ont00001815 rdf:type owl:ObjectProperty ;
                 rdfs:domain cco:ont00001180 ;
                 rdfs:range cco:ont00001180 ;
                 rdfs:label "is subsidiary of"@en ;
-                <http://www.w3.org/2004/02/skos/core#definition> "An Organization o2 is_subsidiary_of Organization o1 iff o1 controls o2 by having the capacity to determine the outcome of decisions about o2's financial and operating policies. "@en ;
+                <http://www.w3.org/2004/02/skos/core#definition> "x is_subsidiary_of y iff x and y are both instances of Organization and y controls x by having the capacity to determine the outcome of decisions about the financial and operating policies of x. "@en ;
                 cco:ont00001754 "http://www.austlii.edu.au/legis/cth/consol_act/ca2001172/s50aa.html)" ;
                 cco:ont00001760 <https://www.commoncoreontologies.org/ModalRelationOntology> .