diff --git a/cinder/tests/unit/volume/flows/test_create_volume_flow.py b/cinder/tests/unit/volume/flows/test_create_volume_flow.py
index 3d8a9fc962b..83b0037d625 100644
--- a/cinder/tests/unit/volume/flows/test_create_volume_flow.py
+++ b/cinder/tests/unit/volume/flows/test_create_volume_flow.py
@@ -14,6 +14,8 @@
 #    under the License.
 """ Tests for create_volume TaskFlow """
 
+import sys
+
 import ddt
 import mock
 
@@ -343,6 +345,61 @@ class CreateVolumeFlowTestCase(test.TestCase):
                            'replication_status': 'disabled'}
         self.assertEqual(expected_result, result)
 
+    @mock.patch('cinder.volume.volume_types.is_encrypted')
+    @mock.patch('cinder.volume.volume_types.get_volume_type_qos_specs')
+    @mock.patch('cinder.volume.flows.api.create_volume.'
+                'ExtractVolumeRequestTask.'
+                '_get_volume_type_id')
+    def test_extract_volume_request_task_with_large_volume_size(
+            self,
+            fake_get_type_id,
+            fake_get_qos,
+            fake_is_encrypted):
+        fake_image_service = fake_image.FakeImageService()
+        image_id = 11
+        image_meta = {}
+        image_meta['id'] = image_id
+        image_meta['status'] = 'active'
+        image_meta['size'] = 1
+        fake_image_service.create(self.ctxt, image_meta)
+        fake_key_manager = mock_key_manager.MockKeyManager()
+        volume_type = 'type1'
+
+        task = create_volume.ExtractVolumeRequestTask(
+            fake_image_service,
+            {'nova'})
+
+        fake_is_encrypted.return_value = False
+        fake_get_type_id.return_value = 1
+        fake_get_qos.return_value = {'qos_specs': None}
+        result = task.execute(self.ctxt,
+                              size=(sys.maxsize + 1),
+                              snapshot=None,
+                              image_id=image_id,
+                              source_volume=None,
+                              availability_zone=None,
+                              volume_type=volume_type,
+                              metadata=None,
+                              key_manager=fake_key_manager,
+                              source_replica=None,
+                              consistencygroup=None,
+                              cgsnapshot=None,
+                              group=None)
+        expected_result = {'size': (sys.maxsize + 1),
+                           'snapshot_id': None,
+                           'source_volid': None,
+                           'availability_zone': 'nova',
+                           'volume_type': volume_type,
+                           'volume_type_id': 1,
+                           'encryption_key_id': None,
+                           'qos_specs': None,
+                           'replication_status': 'disabled',
+                           'source_replicaid': None,
+                           'consistencygroup_id': None,
+                           'cgsnapshot_id': None,
+                           'group_id': None, }
+        self.assertEqual(expected_result, result)
+
     @mock.patch('cinder.volume.volume_types.is_encrypted')
     @mock.patch('cinder.volume.volume_types.get_volume_type_qos_specs')
     @mock.patch('cinder.volume.flows.api.create_volume.'
diff --git a/cinder/volume/flows/api/create_volume.py b/cinder/volume/flows/api/create_volume.py
index 6d9ab197e34..6b4f2bf1c58 100644
--- a/cinder/volume/flows/api/create_volume.py
+++ b/cinder/volume/flows/api/create_volume.py
@@ -15,6 +15,7 @@ from oslo_config import cfg
 from oslo_log import log as logging
 from oslo_utils import timeutils
 from oslo_utils import units
+import six
 import taskflow.engines
 from taskflow.patterns import linear_flow
 from taskflow.types import failure as ft
@@ -169,7 +170,7 @@ class ExtractVolumeRequestTask(flow_utils.CinderTask):
                 raise exception.InvalidInput(reason=msg)
 
         def validate_int(size):
-            if not isinstance(size, int) or size <= 0:
+            if not isinstance(size, six.integer_types) or size <= 0:
                 msg = _("Volume size '%(size)s' must be an integer and"
                         " greater than 0") % {'size': size}
                 raise exception.InvalidInput(reason=msg)