diff --git a/src/cco-extensions/ModalRelationOntology.ttl b/src/cco-extensions/ModalRelationOntology.ttl
index 7f45304..3a57c4b 100644
--- a/src/cco-extensions/ModalRelationOntology.ttl
+++ b/src/cco-extensions/ModalRelationOntology.ttl
@@ -1132,7 +1132,7 @@ mro:ont00001817 rdf:type owl:ObjectProperty ;
                 rdfs:domain obo:BFO_0000015 ;
                 rdfs:range cco:ont00001324 ;
                 rdfs:label "is prohibited by"@en ;
-                <http://www.w3.org/2004/02/skos/core#definition> "y is_prohibited_by y at t iff: x is an instance of Process Regulation at time t, and y is an instance of Process at time t, and x prescribes that y must not occur."@en ;
+                <http://www.w3.org/2004/02/skos/core#definition> "x is_prohibited_by y at t iff: y is an instance of Process Regulation at time t, and x is an instance of Process at time t, and y prescribes that x must not occur."@en ;
                 <http://www.w3.org/2004/02/skos/core#scopeNote> "Given a stronger temporal interpretation, this property may be asymmetric and irreflexive. For more info please refer to https://github.com/BFO-ontology/BFO-2020/tree/master/src/owl/temporal%20extensions."@en ;
                 cco:ont00001760 <https://www.commoncoreontologies.org/ModalRelationOntology> .