diff --git a/dart/iot_sender/bin/set_hro2_dataowners.dart b/dart/iot_sender/bin/set_hro2_dataowners.dart
index 4e71480e..5bfac64f 100644
--- a/dart/iot_sender/bin/set_hro2_dataowners.dart
+++ b/dart/iot_sender/bin/set_hro2_dataowners.dart
@@ -115,7 +115,7 @@ void main(List<String> args) async {
     ..namespaceAware = true;
 
   var key = AtKey()
-    ..key = 'device_data_owner.$libraryNamespace'
+    ..key = 'data_owner_list.$libraryNamespace'
     ..sharedWith = currentAtsign
     ..namespace = atClient?.getPreferences()!.namespace
     ..sharedBy = fromAtsign
diff --git a/dart/iot_sender/lib/iot_mqtt_listener.dart b/dart/iot_sender/lib/iot_mqtt_listener.dart
index 460f459a..d8c6793b 100644
--- a/dart/iot_sender/lib/iot_mqtt_listener.dart
+++ b/dart/iot_sender/lib/iot_mqtt_listener.dart
@@ -220,7 +220,7 @@ Future<List<HrO2DataOwner>> getDataOwners(AtClient atClient, String ownerAtsign,
     ..namespaceAware = true;
 
   var key = AtKey()
-    ..key = 'device_data_owner.$libraryNamespace'
+    ..key = 'data_owner_list.$libraryNamespace'
     ..namespace = atClient.getPreferences()!.namespace
     ..sharedBy = ownerAtsign
     ..metadata = metaData;