diff --git a/src/cco-modules/ExtendedRelationOntology.ttl b/src/cco-modules/ExtendedRelationOntology.ttl
index 33993e8..b676b7a 100644
--- a/src/cco-modules/ExtendedRelationOntology.ttl
+++ b/src/cco-modules/ExtendedRelationOntology.ttl
@@ -39,7 +39,7 @@ cco:acronym rdf:type owl:AnnotationProperty ;
             cco:definition "An Alternative Label that consists of a shortened or abbreviated form of the rdfs:label and is used to denote the entity."@en ;
             cco:is_curated_in_ontology "http://www.ontologyrepository.com/CommonCoreOntologies/Mid/ExtendedRelationOntology"^^xsd:anyURI ;
             rdfs:label "acronym"@en ;
-            rdfs:subPropertyOf cco:alternative_label .
+            rdfs:subPropertyOf skos:altLabel .
 
 
 ###  http://www.ontologyrepository.com/CommonCoreOntologies/alternative_label