diff --git a/ontology/saref4wear.ttl b/ontology/saref4wear.ttl
index d2b7a4b3ad08db33b17e92ebc5040ad2b2e9e478..ea243367e5812150bfb2fb41407a323060265e8f 100644
--- a/ontology/saref4wear.ttl
+++ b/ontology/saref4wear.ttl
@@ -250,7 +250,7 @@ s4syst:connectedTo rdf:type owl:ObjectProperty ;
 
 ###  https://saref.etsi.org/saref4wear/controlsFeature
 s4wear:controlsFeature rdf:type owl:ObjectProperty ;
-                       rdfs:domain saref:Device ;
+                       rdfs:domain s4wear:WearableDevice ;
                        rdfs:range saref:FeatureOfInterest ;
                        rdfs:comment "A relationship specifying the features of interest that are controlled by a device."@en ;
                        rdfs:label "controls feature"@en .
@@ -259,7 +259,7 @@ s4wear:controlsFeature rdf:type owl:ObjectProperty ;
 ###  https://saref.etsi.org/saref4wear/featureIsControlledByDevice
 s4wear:featureIsControlledByDevice rdf:type owl:ObjectProperty ;
                                    rdfs:domain saref:FeatureOfInterest ;
-                                   rdfs:range saref:Device ;
+                                   rdfs:range s4wear:WearableDevice ;
                                    rdfs:comment "A relationship specifying the devices that control a feature of interest."@en ;
                                    rdfs:label "feature is controlled by device"@en .
 
@@ -267,7 +267,7 @@ s4wear:featureIsControlledByDevice rdf:type owl:ObjectProperty ;
 ###  https://saref.etsi.org/saref4wear/featureIsMeasuredByDevice
 s4wear:featureIsMeasuredByDevice rdf:type owl:ObjectProperty ;
                                  rdfs:domain saref:FeatureOfInterest ;
-                                 rdfs:range saref:Device ;
+                                 rdfs:range s4wear:WearableDevice ;
                                  rdfs:comment "A relationship specifying the devices that measure a feature of interest."@en ;
                                  rdfs:label "feature is measured by device"@en .
 
@@ -366,7 +366,7 @@ s4wear:isTriggeredBy rdf:type owl:ObjectProperty ;
 
 ###  https://saref.etsi.org/saref4wear/measuresFeature
 s4wear:measuresFeature rdf:type owl:ObjectProperty ;
-                       rdfs:domain saref:Device ;
+                       rdfs:domain s4wear:WearableDevice ;
                        rdfs:range saref:FeatureOfInterest ;
                        rdfs:comment "A relationship specifying the features of interest that are measured by a device."@en ;
                        rdfs:label "measures feature"@en .