diff --git a/trytond/trytond/backend/postgresql/database.py b/trytond/trytond/backend/postgresql/database.py
index 2dec0f9c10..49bc85ecdd 100644
--- a/trytond/trytond/backend/postgresql/database.py
+++ b/trytond/trytond/backend/postgresql/database.py
@@ -480,7 +480,7 @@ class Database(DatabaseInterface):
         cursor.execute('SELECT pg_notify(%s, %s)', (channel, payload))
 
     def get_notifications(self, connection):
-        return list(connection.notifies(timeout=2))
+        return list(connection.notifies(timeout=0))
 
     def lock(self, connection, table):
         cursor = connection.cursor()