diff --git a/neutron/api/rpc/handlers/securitygroups_rpc.py b/neutron/api/rpc/handlers/securitygroups_rpc.py
index 857e99d8c49..2a748cfbcc7 100644
--- a/neutron/api/rpc/handlers/securitygroups_rpc.py
+++ b/neutron/api/rpc/handlers/securitygroups_rpc.py
@@ -17,14 +17,11 @@ from neutron import manager
 
 
 # TODO(amotoki): Move security group RPC API and agent callback
-# from securitygroups_rpc.py.
+# from neutron/agent/securitygroups_rpc.py.
 
 
 class SecurityGroupServerRpcCallback(n_rpc.RpcCallback):
-    """Callback for SecurityGroup agent RPC in plugin implementations.
-
-    Subclass which inherits this class must implement get_port_from_device().
-    """
+    """Callback for SecurityGroup agent RPC in plugin implementations."""
 
     # API version history:
     #   1.1 - Initial version
diff --git a/neutron/plugins/ml2/rpc.py b/neutron/plugins/ml2/rpc.py
index 52d3980d92c..d9cb07efd46 100644
--- a/neutron/plugins/ml2/rpc.py
+++ b/neutron/plugins/ml2/rpc.py
@@ -40,7 +40,9 @@ class RpcCallbacks(n_rpc.RpcCallback,
     #   1.0 Initial version (from openvswitch/linuxbridge)
     #   1.1 Support Security Group RPC
     #   1.2 Support get_devices_details_list
-    #   1.3 Support Distributed Virtual Router (DVR)
+    #   1.3 get_device_details rpc signature upgrade to obtain 'host' and
+    #       return value to include fixed_ips and device_owner for
+    #       the device port
 
     def __init__(self, notifier, type_manager):
         self.setup_tunnel_callback_mixin(notifier, type_manager)