diff --git a/cinderclient/tests/unit/v2/test_shell.py b/cinderclient/tests/unit/v2/test_shell.py
index 07f44eb..0e2421a 100644
--- a/cinderclient/tests/unit/v2/test_shell.py
+++ b/cinderclient/tests/unit/v2/test_shell.py
@@ -334,6 +334,13 @@ class ShellTest(utils.TestCase):
     def test_create_size_required_if_not_snapshot_or_clone(self):
         self.assertRaises(SystemExit, self.run_command, 'create')
 
+    def test_create_size_zero_if_not_snapshot_or_clone(self):
+        expected = {'volume': {'status': 'creating',
+                               'size': 0}}
+        self.run_command('create 0')
+        self.assert_called_anytime('POST', '/volumes', partial_body=expected)
+        self.assert_called('GET', '/volumes/1234')
+
     def test_show(self):
         self.run_command('show 1234')
         self.assert_called('GET', '/volumes/1234')
diff --git a/cinderclient/v2/shell.py b/cinderclient/v2/shell.py
index 3c13636..463f43d 100644
--- a/cinderclient/v2/shell.py
+++ b/cinderclient/v2/shell.py
@@ -261,8 +261,8 @@ def do_show(cs, args):
 
 class CheckSizeArgForCreate(argparse.Action):
     def __call__(self, parser, args, values, option_string=None):
-        if (values or args.snapshot_id or args.source_volid
-           or args.source_replica) is None:
+        if ((args.snapshot_id or args.source_volid or args.source_replica)
+                is None and values is None):
             parser.error('Size is a required parameter if snapshot '
                          'or source volume is not specified.')
         setattr(args, self.dest, values)