diff --git a/neutronclient/neutron/v2_0/fw/firewallpolicy.py b/neutronclient/neutron/v2_0/fw/firewallpolicy.py
index f2f147337..32f25eba9 100644
--- a/neutronclient/neutron/v2_0/fw/firewallpolicy.py
+++ b/neutronclient/neutron/v2_0/fw/firewallpolicy.py
@@ -33,6 +33,29 @@ def _format_firewall_rules(firewall_policy):
         return ''
 
 
+def common_add_known_arguments(parser):
+    parser.add_argument(
+        '--firewall-rules', type=lambda x: x.split(),
+        help=_('Ordered list of whitespace-delimited firewall rule '
+               'names or IDs; e.g., --firewall-rules \"rule1 rule2\"'))
+
+
+def common_args2body(client, parsed_args):
+    if parsed_args.firewall_rules:
+        _firewall_rules = []
+        for f in parsed_args.firewall_rules:
+            _firewall_rules.append(
+                neutronv20.find_resourceid_by_name_or_id(
+                    client, 'firewall_rule', f))
+        body = {'firewall_policy': {'firewall_rules': _firewall_rules}}
+    else:
+        body = {'firewall_policy': {}}
+    neutronv20.update_dict(parsed_args, body['firewall_policy'],
+                           ['name', 'description', 'shared',
+                            'audited', 'tenant_id'])
+    return body
+
+
 class ListFirewallPolicy(neutronv20.ListCommand):
     """List firewall policies that belong to a given tenant."""
 
@@ -69,10 +92,7 @@ class CreateFirewallPolicy(neutronv20.CreateCommand):
             action='store_true',
             help=_('Create a shared policy.'),
             default=argparse.SUPPRESS)
-        parser.add_argument(
-            '--firewall-rules', type=lambda x: x.split(),
-            help=_('Ordered list of whitespace-delimited firewall rule '
-                   'names or IDs; e.g., --firewall-rules \"rule1 rule2\"'))
+        common_add_known_arguments(parser)
         parser.add_argument(
             '--audited',
             action='store_true',
@@ -80,22 +100,7 @@ class CreateFirewallPolicy(neutronv20.CreateCommand):
             default=argparse.SUPPRESS)
 
     def args2body(self, parsed_args):
-        if parsed_args.firewall_rules:
-            _firewall_rules = []
-            for f in parsed_args.firewall_rules:
-                _firewall_rules.append(
-                    neutronv20.find_resourceid_by_name_or_id(
-                        self.get_client(), 'firewall_rule', f))
-            body = {self.resource: {
-                    'firewall_rules': _firewall_rules,
-                    },
-                    }
-        else:
-            body = {self.resource: {}}
-        neutronv20.update_dict(parsed_args, body[self.resource],
-                               ['name', 'description', 'shared',
-                                'audited', 'tenant_id'])
-        return body
+        return common_args2body(self.get_client(), parsed_args)
 
 
 class UpdateFirewallPolicy(neutronv20.UpdateCommand):
@@ -103,6 +108,12 @@ class UpdateFirewallPolicy(neutronv20.UpdateCommand):
 
     resource = 'firewall_policy'
 
+    def add_known_arguments(self, parser):
+        common_add_known_arguments(parser)
+
+    def args2body(self, parsed_args):
+        return common_args2body(self.get_client(), parsed_args)
+
 
 class DeleteFirewallPolicy(neutronv20.DeleteCommand):
     """Delete a given firewall policy."""
diff --git a/neutronclient/tests/unit/fw/test_cli20_firewallpolicy.py b/neutronclient/tests/unit/fw/test_cli20_firewallpolicy.py
index 272a98cda..a8786dbbc 100644
--- a/neutronclient/tests/unit/fw/test_cli20_firewallpolicy.py
+++ b/neutronclient/tests/unit/fw/test_cli20_firewallpolicy.py
@@ -133,6 +133,18 @@ class CLITestV20FirewallPolicyJSON(test_cli20.CLITestV20Base):
                                    ['myid', '--name', 'newname'],
                                    {'name': 'newname', })
 
+    def test_update_firewall_policy_with_rules(self):
+        """firewall-policy-update myid --firewall-rules "rule1 rule2"."""
+        resource = 'firewall_policy'
+        cmd = firewallpolicy.UpdateFirewallPolicy(test_cli20.MyApp(sys.stdout),
+                                                  None)
+        firewall_rules_arg = u'rule_id3 rule_id4'
+        firewall_rules_res = ['rule_id3', 'rule_id4']
+        self._test_update_resource(
+            resource, cmd, 'myid',
+            ['myid', '--firewall-rules', firewall_rules_arg],
+            {'firewall_rules': firewall_rules_res, })
+
     def test_delete_firewall_policy(self):
         """firewall-policy-delete my-id."""
         resource = 'firewall_policy'