diff --git a/kuryr_kubernetes/controller/drivers/nested_vlan_vif.py b/kuryr_kubernetes/controller/drivers/nested_vlan_vif.py
index afee77df8..53d6c7053 100644
--- a/kuryr_kubernetes/controller/drivers/nested_vlan_vif.py
+++ b/kuryr_kubernetes/controller/drivers/nested_vlan_vif.py
@@ -218,7 +218,7 @@ class NestedVlanPodVIFDriver(nested_vif.NestedPodVIFDriver):
 
     def _remove_subports(self, neutron, trunk_id, subports_id):
         subports_body = []
-        for subport_id in subports_id:
+        for subport_id in set(subports_id):
             subports_body.append({'port_id': subport_id})
         try:
             neutron.trunk_remove_subports(trunk_id,
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 70f413b19..61fa7a4a4 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
@@ -576,6 +576,19 @@ class TestNestedVlanPodVIFDriver(test_base.TestCase):
         neutron.trunk_remove_subports.assert_called_once_with(
             trunk_id, {'sub_ports': subportid_dict})
 
+    def test__remove_subports_duplicate(self):
+        cls = nested_vlan_vif.NestedVlanPodVIFDriver
+        m_driver = mock.Mock(spec=cls)
+        neutron = self.useFixture(k_fix.MockNeutronClient()).client
+        trunk_id = mock.sentinel.trunk_id
+        subport_id = mock.sentinel.subport_id
+        subportid_dict = [{'port_id': subport_id}]
+        cls._remove_subports(m_driver, neutron, trunk_id, [subport_id,
+                                                           subport_id])
+
+        neutron.trunk_remove_subports.assert_called_once_with(
+            trunk_id, {'sub_ports': subportid_dict})
+
     @mock.patch('kuryr.lib.segmentation_type_drivers.allocate_segmentation_id')
     def test_get_vlan_id(self, mock_alloc_seg_id):
         cls = nested_vlan_vif.NestedVlanPodVIFDriver