diff --git a/addons/bus/models/bus.py b/addons/bus/models/bus.py
index 9c262ae3e17..00b351451d9 100644
--- a/addons/bus/models/bus.py
+++ b/addons/bus/models/bus.py
@@ -3,11 +3,12 @@ import contextlib
 import datetime
 import json
 import logging
+import os
 import random
 import selectors
 import threading
 import time
-from psycopg2 import InterfaceError
+from psycopg2 import InterfaceError, sql
 
 import odoo
 from odoo import api, fields, models
@@ -20,6 +21,9 @@ _logger = logging.getLogger(__name__)
 # longpolling timeout connection
 TIMEOUT = 50
 
+# custom function to call instead of default PostgreSQL's `pg_notify`
+ODOO_NOTIFY_FUNCTION = os.getenv('ODOO_NOTIFY_FUNCTION', 'pg_notify')
+
 #----------------------------------------------------------
 # Bus
 #----------------------------------------------------------
@@ -77,7 +81,8 @@ class ImBus(models.Model):
             @self.env.cr.postcommit.add
             def notify():
                 with odoo.sql_db.db_connect('postgres').cursor() as cr:
-                    cr.execute("notify imbus, %s", (json_dump(list(channels)),))
+                    query = sql.SQL("SELECT {}('imbus', %s)").format(sql.Identifier(ODOO_NOTIFY_FUNCTION))
+                    cr.execute(query, (json_dump(list(channels)), ))
 
     @api.model
     def _sendone(self, channel, notification_type, message):
diff --git a/odoo/addons/base/models/ir_cron.py b/odoo/addons/base/models/ir_cron.py
index e251db29548..c95c1303928 100644
--- a/odoo/addons/base/models/ir_cron.py
+++ b/odoo/addons/base/models/ir_cron.py
@@ -7,6 +7,7 @@ import psycopg2
 import pytz
 from datetime import datetime, timedelta
 from dateutil.relativedelta import relativedelta
+from psycopg2 import sql
 
 import odoo
 from odoo import api, fields, models, _
@@ -17,6 +18,9 @@ _logger = logging.getLogger(__name__)
 BASE_VERSION = odoo.modules.get_manifest('base')['version']
 MAX_FAIL_TIME = timedelta(hours=5)  # chosen with a fair roll of the dice
 
+# custom function to call instead of default PostgreSQL's `pg_notify`
+ODOO_NOTIFY_FUNCTION = os.getenv('ODOO_NOTIFY_FUNCTION', 'pg_notify')
+
 
 class BadVersion(Exception):
     pass
@@ -515,7 +519,8 @@ class ir_cron(models.Model):
         ir_cron modification and on trigger creation (regardless of call_at)
         """
         with odoo.sql_db.db_connect('postgres').cursor() as cr:
-            cr.execute('NOTIFY cron_trigger, %s', [self.env.cr.dbname])
+            query = sql.SQL("SELECT {}('cron_trigger', %s)").format(sql.Identifier(ODOO_NOTIFY_FUNCTION))
+            cr.execute(query, [self.env.cr.dbname])
         _logger.debug("cron workers notified")