diff --git a/neutron/db/db_base_plugin_v2.py b/neutron/db/db_base_plugin_v2.py
index 8a67a20a30b..9eed74b4327 100644
--- a/neutron/db/db_base_plugin_v2.py
+++ b/neutron/db/db_base_plugin_v2.py
@@ -17,6 +17,7 @@ import functools
 
 import netaddr
 from neutron_lib.api.definitions import ip_allocation as ipalloc_apidef
+from neutron_lib.api.definitions import port as port_def
 from neutron_lib.api.definitions import portbindings as portbindings_def
 from neutron_lib.api.definitions import subnetpool as subnetpool_def
 from neutron_lib.api import validators
@@ -1564,8 +1565,7 @@ class NeutronDbPluginV2(db_base_plugin_common.DbBasePluginCommon,
                                       marker_obj=marker_obj,
                                       page_reverse=page_reverse)
         items = [self._make_port_dict(c, fields, bulk=True) for c in query]
-        # TODO(obondarev): use neutron_lib constant
-        resource_extend.apply_funcs('ports_bulk', items, None)
+        resource_extend.apply_funcs(port_def.COLLECTION_NAME_BULK, items, None)
         if limit and page_reverse:
             items.reverse()
         return items
diff --git a/neutron/services/qos/qos_plugin.py b/neutron/services/qos/qos_plugin.py
index 81b12cfc1c5..c56db9c8975 100644
--- a/neutron/services/qos/qos_plugin.py
+++ b/neutron/services/qos/qos_plugin.py
@@ -177,8 +177,7 @@ class QoSPlugin(qos.QoSPluginBase):
         return [physnet_trait, vnic_trait]
 
     @staticmethod
-    # TODO(obondarev): use neutron_lib constant
-    @resource_extend.extends(['ports_bulk'])
+    @resource_extend.extends([port_def.COLLECTION_NAME_BULK])
     def _extend_port_resource_request_bulk(ports_res, noop):
         """Add resource request to a list of ports."""
         min_bw_rules = dict()
diff --git a/neutron/services/trunk/plugin.py b/neutron/services/trunk/plugin.py
index 27262e8eb8e..0b3b0e8d072 100644
--- a/neutron/services/trunk/plugin.py
+++ b/neutron/services/trunk/plugin.py
@@ -92,8 +92,7 @@ class TrunkPlugin(service_base.ServicePluginBase):
         return port_res
 
     @staticmethod
-    # TODO(obondarev): use neutron_lib constant
-    @resource_extend.extends(['ports_bulk'])
+    @resource_extend.extends([port_def.COLLECTION_NAME_BULK])
     def _extend_port_trunk_details_bulk(ports_res, noop):
         """Add trunk subport details to a list of ports."""
         subport_ids = []