diff --git a/qui/devices/backend.py b/qui/devices/backend.py
index d424edce..1dfaacd9 100644
--- a/qui/devices/backend.py
+++ b/qui/devices/backend.py
@@ -229,9 +229,8 @@ def attach_to_vm(self, vm: VM):
         Perform attachment to provided VM.
         """
         try:
-            assignment = qubesadmin.devices.DeviceAssignment(
-                self.backend_domain, self.id_string,
-                persistent=False)
+            assignment = qubesadmin.device_protocol.DeviceAssignment(
+                self.backend_domain, self.id_string)
 
             vm.vm_object.devices[self.device_class].attach(assignment)
             self.gtk_app.emit_notification(
@@ -261,9 +260,8 @@ def detach_from_vm(self, vm: VM):
             Gio.NotificationPriority.NORMAL,
             notification_id=self.notification_id)
         try:
-            assignment = qubesadmin.devices.DeviceAssignment(
-                self.backend_domain, self._ident,
-                persistent=False)
+            assignment = qubesadmin.device_protocol.DeviceAssignment(
+                self.backend_domain, self._ident)
             vm.vm_object.devices[self.device_class].detach(assignment)
         except qubesadmin.exc.QubesException as ex:
             self.gtk_app.emit_notification(
diff --git a/qui/devices/device_widget.py b/qui/devices/device_widget.py
index 4fcc66f9..386b282d 100644
--- a/qui/devices/device_widget.py
+++ b/qui/devices/device_widget.py
@@ -179,7 +179,8 @@ def initialize_dev_data(self):
         for domain in self.qapp.domains:
             for devclass in DEV_TYPES:
                 try:
-                    for device in domain.devices[devclass].attached():
+                    for device in domain.devices[devclass
+                            ].get_attached_devices():
                         dev = str(device)
                         if dev in self.devices:
                             # occassionally ghost UnknownDevices appear when a
@@ -227,7 +228,7 @@ def vm_start(self, vm, _event, **_kwargs):
 
         for devclass in DEV_TYPES:
             try:
-                for device in vm.devices[devclass].attached():
+                for device in vm.devices[devclass].get_attached_devices():
                     dev = str(device)
                     if dev in self.devices:
                         self.devices[dev].attachments.add(wrapped_vm)