diff --git a/neutron/extensions/providernet.py b/neutron/extensions/providernet.py
index 944de104fb..2dc966ae72 100644
--- a/neutron/extensions/providernet.py
+++ b/neutron/extensions/providernet.py
@@ -35,7 +35,7 @@ EXTENDED_ATTRIBUTES_2_0 = {
                            'enforce_policy': True,
                            'is_visible': True},
         SEGMENTATION_ID: {'allow_post': True, 'allow_put': True,
-                          'convert_to': int,
+                          'convert_to': attributes.convert_to_int,
                           'enforce_policy': True,
                           'default': attributes.ATTR_NOT_SPECIFIED,
                           'is_visible': True},
diff --git a/neutron/tests/unit/test_extension_pnet.py b/neutron/tests/unit/test_extension_pnet.py
index e6959a1227..211fe7151c 100644
--- a/neutron/tests/unit/test_extension_pnet.py
+++ b/neutron/tests/unit/test_extension_pnet.py
@@ -122,6 +122,18 @@ class ProvidernetExtensionTestCase(testlib_api.WebTestCase):
                             expect_errors=expect_errors)
         return res, data
 
+    def _post_network_with_bad_provider_attrs(self, ctx, bad_data,
+                                              expect_errors=False):
+        data = self._prepare_net_data()
+        data.update(bad_data)
+        env = {'neutron.context': ctx}
+        res = self.api.post(test_api_v2._get_path('networks', fmt=self.fmt),
+                            self.serialize({'network': data}),
+                            content_type='application/' + self.fmt,
+                            extra_environ=env,
+                            expect_errors=expect_errors)
+        return res, data
+
     def test_network_create_with_provider_attrs(self):
         ctx = context.get_admin_context()
         ctx.tenant_id = 'an_admin'
@@ -135,6 +147,14 @@ class ProvidernetExtensionTestCase(testlib_api.WebTestCase):
                                                    network=exp_input)
         self.assertEqual(res.status_int, web_exc.HTTPCreated.code)
 
+    def test_network_create_with_bad_provider_attrs_400(self):
+        ctx = context.get_admin_context()
+        ctx.tenant_id = 'an_admin'
+        bad_data = {pnet.SEGMENTATION_ID: "abc"}
+        res, _1 = self._post_network_with_bad_provider_attrs(ctx, bad_data,
+                                                             True)
+        self.assertEqual(web_exc.HTTPBadRequest.code, res.status_int)
+
     def test_network_update_with_provider_attrs(self):
         ctx = context.get_admin_context()
         ctx.tenant_id = 'an_admin'