diff --git a/ontology/CASE-develop.ttl b/ontology/CASE-develop.ttl
index df267a52..936c3fdb 100644
--- a/ontology/CASE-develop.ttl
+++ b/ontology/CASE-develop.ttl
@@ -2429,7 +2429,7 @@ core:UcoInherentCharacterizationThing
 
 core:UcoInherentCharacterizationThing-disjointWith-UcoObject-shape
 	a sh:NodeShape ;
-	sh:message "observable:UcoInherentCharacterizationThing and observable:UcoObject are disjoint classes.  Assigning both types to a single node will be an error in UCO 2.0.0."@en ;
+	sh:message "core:UcoInherentCharacterizationThing and core:UcoObject are disjoint classes.  Assigning both types to a single node will be an error in UCO 2.0.0."@en ;
 	sh:not [
 		a sh:NodeShape ;
 		sh:class core:UcoObject ;