diff --git a/ontology/saref4wear.ttl b/ontology/saref4wear.ttl
index 94a14eb52e032e056d2384219896801c061e2b90..685cf9403fa400eb8b4cb0d1c904948816c4595f 100644
--- a/ontology/saref4wear.ttl
+++ b/ontology/saref4wear.ttl
@@ -376,7 +376,6 @@ s4wear:hasOperatingTemperature rdf:type owl:DatatypeProperty ;
 
 ###  https://saref.etsi.org/saref4wear/hasStorage
 s4wear:hasStorage rdf:type owl:DatatypeProperty ;
-                  rdfs:subPropertyOf owl:topDataProperty ;
                   rdfs:domain s4wear:Wearable ;
                   rdfs:range xsd:double .