diff --git a/ontology/uco/core/core.ttl b/ontology/uco/core/core.ttl
index 2b8a76ac..7b905c3e 100644
--- a/ontology/uco/core/core.ttl
+++ b/ontology/uco/core/core.ttl
@@ -18,7 +18,7 @@
 
 action:Action
 	a owl:Class ;
-	rdfs:isDefinedBy <https://ontology.unifiedcyberontology.org/uco/types> ;
+	rdfs:isDefinedBy <https://ontology.unifiedcyberontology.org/uco/action> ;
 	.
 
 core:Annotation