diff --git a/neutron/plugins/ml2/plugin.py b/neutron/plugins/ml2/plugin.py
index 7084c4621be..292fa06a5cd 100644
--- a/neutron/plugins/ml2/plugin.py
+++ b/neutron/plugins/ml2/plugin.py
@@ -1365,9 +1365,6 @@ class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2,
 
         registry.notify(resources.PORT, events.BEFORE_CREATE, self,
                         context=context, port=attrs)
-        # NOTE(kevinbenton): triggered outside of transaction since it
-        # emits 'AFTER' events if it creates.
-        self._ensure_default_security_group(context, attrs['tenant_id'])
 
     def _create_port_db(self, context, port):
         attrs = port[port_def.RESOURCE_NAME]