diff --git a/vmware_nsxlib/tests/unit/v3/policy/test_resources.py b/vmware_nsxlib/tests/unit/v3/policy/test_resources.py
index abb90639..4a48820f 100644
--- a/vmware_nsxlib/tests/unit/v3/policy/test_resources.py
+++ b/vmware_nsxlib/tests/unit/v3/policy/test_resources.py
@@ -4041,7 +4041,8 @@ class TestPolicySegment(NsxPolicyLibTestCase):
 
     def _test_create(self, tier1_id=None, tier0_id=None, mdproxy=None,
                      dhcp_server=None, admin_state=None,
-                     ip_pool_id='external-ip-pool', ls_id=None):
+                     ip_pool_id='external-ip-pool', ls_id=None,
+                     unique_id=None):
         name = 'test'
         description = 'desc'
         subnets = [core_defs.Subnet(gateway_address="2.2.2.0/24")]
@@ -4065,6 +4066,8 @@ class TestPolicySegment(NsxPolicyLibTestCase):
 
         if ls_id:
             kwargs['ls_id'] = ls_id
+        if unique_id:
+            kwargs['unique_id'] = unique_id
 
         with mock.patch.object(self.policy_api,
                                "create_or_update") as api_call:
@@ -4119,6 +4122,9 @@ class TestPolicySegment(NsxPolicyLibTestCase):
     def test_create_with_ls_id(self):
         self._test_create(ls_id='lsid1')
 
+    def test_create_with_unique_id(self):
+        self._test_create(unique_id='lsid1')
+
     def test_delete(self):
         segment_id = '111'
         with mock.patch.object(self.policy_api, "delete") as api_call:
diff --git a/vmware_nsxlib/v3/policy/core_defs.py b/vmware_nsxlib/v3/policy/core_defs.py
index 6a200607..783ce9b5 100644
--- a/vmware_nsxlib/v3/policy/core_defs.py
+++ b/vmware_nsxlib/v3/policy/core_defs.py
@@ -960,7 +960,8 @@ class SegmentDef(BaseSegmentDef):
     def version_dependant_attr_map(self):
         return {'metadata_proxy_id': nsx_constants.NSX_VERSION_3_0_0,
                 'dhcp_server_config_id': nsx_constants.NSX_VERSION_3_0_0,
-                'admin_state': nsx_constants.NSX_VERSION_3_0_0}
+                'admin_state': nsx_constants.NSX_VERSION_3_0_0,
+                'unique_id': nsx_constants.NSX_VERSION_3_1_0}
 
     def get_obj_dict(self):
         body = super(SegmentDef, self).get_obj_dict()
@@ -1032,6 +1033,8 @@ class SegmentDef(BaseSegmentDef):
             self._set_attr_if_specified(body, 'admin_state',
                                         value=admin_state)
 
+        self._set_attr_if_supported(body, 'unique_id')
+
         return body
 
 
diff --git a/vmware_nsxlib/v3/policy/core_resources.py b/vmware_nsxlib/v3/policy/core_resources.py
index d66ef82f..8c7c36d9 100644
--- a/vmware_nsxlib/v3/policy/core_resources.py
+++ b/vmware_nsxlib/v3/policy/core_resources.py
@@ -1941,6 +1941,7 @@ class NsxPolicySegmentApi(NsxPolicyResourceBase):
                             dhcp_server_config_id=IGNORE,
                             admin_state=IGNORE,
                             ls_id=IGNORE,
+                            unique_id=IGNORE,
                             tags=IGNORE,
                             tenant=constants.POLICY_INFRA_TENANT):
 
@@ -1965,6 +1966,7 @@ class NsxPolicySegmentApi(NsxPolicyResourceBase):
             dhcp_server_config_id=dhcp_server_config_id,
             admin_state=admin_state,
             ls_id=ls_id,
+            unique_id=unique_id,
             tags=tags,
             tenant=tenant)
         self._create_or_store(segment_def)