diff --git a/nova/api/openstack/compute/servers.py b/nova/api/openstack/compute/servers.py
index 4d0acd538c72..97d4b96df2bd 100644
--- a/nova/api/openstack/compute/servers.py
+++ b/nova/api/openstack/compute/servers.py
@@ -712,7 +712,8 @@ class ServersController(wsgi.Controller):
                 exception.ImageNUMATopologyCPUDuplicates,
                 exception.ImageNUMATopologyCPUsUnassigned,
                 exception.ImageNUMATopologyMemoryOutOfRange,
-                exception.InstanceGroupNotFound) as error:
+                exception.InstanceGroupNotFound,
+                exception.PciRequestAliasNotDefined) as error:
             raise exc.HTTPBadRequest(explanation=error.format_message())
         except (exception.PortInUse,
                 exception.InstanceExists,
@@ -943,7 +944,8 @@ class ServersController(wsgi.Controller):
                 exception.CannotResizeDisk,
                 exception.CannotResizeToSameFlavor,
                 exception.FlavorNotFound,
-                exception.NoValidHost) as e:
+                exception.NoValidHost,
+                exception.PciRequestAliasNotDefined) as e:
             raise exc.HTTPBadRequest(explanation=e.format_message())
         except exception.Invalid:
             msg = _("Invalid instance image.")
diff --git a/nova/tests/unit/api/openstack/compute/test_server_actions.py b/nova/tests/unit/api/openstack/compute/test_server_actions.py
index b6af65ca6a5b..aacf455034ee 100644
--- a/nova/tests/unit/api/openstack/compute/test_server_actions.py
+++ b/nova/tests/unit/api/openstack/compute/test_server_actions.py
@@ -800,6 +800,16 @@ class ServerActionsControllerTestV21(test.TestCase):
                           self.controller._action_resize,
                           self.req, FAKE_UUID, body=body)
 
+    @mock.patch('nova.compute.api.API.resize',
+                side_effect=exception.PciRequestAliasNotDefined(
+                    alias='fake_name'))
+    def test_resize_pci_alias_not_defined(self, mock_resize):
+        # Tests that PciRequestAliasNotDefined is translated to a 400 error.
+        body = dict(resize=dict(flavorRef="http://localhost/3"))
+        self.assertRaises(webob.exc.HTTPBadRequest,
+                          self.controller._action_resize,
+                          self.req, FAKE_UUID, body=body)
+
     def test_confirm_resize_server(self):
         body = dict(confirmResize=None)
 
diff --git a/nova/tests/unit/api/openstack/compute/test_serversV21.py b/nova/tests/unit/api/openstack/compute/test_serversV21.py
index fe0b47d2e92f..5a1ed2162e3f 100644
--- a/nova/tests/unit/api/openstack/compute/test_serversV21.py
+++ b/nova/tests/unit/api/openstack/compute/test_serversV21.py
@@ -3377,6 +3377,14 @@ class ServersControllerCreateTest(test.TestCase):
                           self.controller.create,
                           self.req, body=self.body)
 
+    @mock.patch.object(compute_api.API, 'create',
+                       side_effect=exception.PciRequestAliasNotDefined(
+                           alias='fake_name'))
+    def test_create_instance_pci_alias_not_defined(self, mock_create):
+        # Tests that PciRequestAliasNotDefined is translated to a 400 error.
+        self.assertRaises(webob.exc.HTTPBadRequest,
+                          self._test_create_extra, {})
+
 
 class ServersControllerCreateTestV219(ServersControllerCreateTest):
     def _create_instance_req(self, set_desc, desc=None):