diff --git a/kuryr_kubernetes/controller/drivers/nested_vlan_vif.py b/kuryr_kubernetes/controller/drivers/nested_vlan_vif.py
index 4cd863922..e3dabea10 100644
--- a/kuryr_kubernetes/controller/drivers/nested_vlan_vif.py
+++ b/kuryr_kubernetes/controller/drivers/nested_vlan_vif.py
@@ -306,6 +306,6 @@ class NestedVlanPodVIFDriver(nested_vif.NestedPodVIFDriver):
         os_net = clients.get_network_client()
         trunk = os_net.get_trunk(trunk_id)
         for port in trunk.sub_ports:
-            vlan_ids.add(port.segmentation_id)
+            vlan_ids.add(port['segmentation_id'])
 
         return vlan_ids
diff --git a/kuryr_kubernetes/tests/unit/controller/drivers/test_nested_vlan_vif.py b/kuryr_kubernetes/tests/unit/controller/drivers/test_nested_vlan_vif.py
index a069e5874..b01c4c363 100644
--- a/kuryr_kubernetes/tests/unit/controller/drivers/test_nested_vlan_vif.py
+++ b/kuryr_kubernetes/tests/unit/controller/drivers/test_nested_vlan_vif.py
@@ -644,7 +644,7 @@ class TestNestedVlanPodVIFDriver(test_base.TestCase):
         trunk_id = mock.sentinel.trunk_id
         vlan_ids.add('100')
 
-        port = os_port.Port(segmentation_id='100')
+        port = {"segmentation_id": '100'}  # Trunk.sub_ports is a list of dicts
         trunk_obj = os_trunk.Trunk(sub_ports=[port])
         os_net.get_trunk.return_value = trunk_obj
         self.assertEqual(vlan_ids,