diff --git a/ontology/saref4inma.ttl b/ontology/saref4inma.ttl
index 7c963d4659cd3db3dd803032977e67fa803331db..99137df7c3f7368fcc4e9af9a10d4f16961dea92 100644
--- a/ontology/saref4inma.ttl
+++ b/ontology/saref4inma.ttl
@@ -208,6 +208,7 @@ s4inma:isProducedBy rdf:type owl:ObjectProperty ;
 
 ###  https://saref.etsi.org/saref4inma/needsEquipment
 s4inma:needsEquipment rdf:type owl:ObjectProperty ;
+                      rdfs:range s4inma:ProductionEquipment ;
                       rdfs:comment "A relationship indicating that an entity needs a particular equipment to be produced" ;
                       rdfs:label "needs equipment"@en .