diff --git a/ontology/CASE-develop.ttl b/ontology/CASE-develop.ttl
index 5ee476de..eddaece1 100644
--- a/ontology/CASE-develop.ttl
+++ b/ontology/CASE-develop.ttl
@@ -5777,6 +5777,12 @@ observable:DeviceFacet
 			sh:nodeKind sh:IRI ;
 			sh:path observable:manufacturer ;
 		] ,
+		[
+			sh:datatype xsd:string ;
+			sh:maxCount "1"^^xsd:integer ;
+			sh:nodeKind sh:Literal ;
+			sh:path observable:cpeid ;
+		] ,
 		[
 			sh:datatype xsd:string ;
 			sh:maxCount "1"^^xsd:integer ;