diff --git a/application/Espo/Core/Formula/Functions/FunctionBase.php b/application/Espo/Core/Formula/Functions/FunctionBase.php
index b4aa038971..877e09c372 100644
--- a/application/Espo/Core/Formula/Functions/FunctionBase.php
+++ b/application/Espo/Core/Formula/Functions/FunctionBase.php
@@ -50,7 +50,7 @@ abstract class FunctionBase
         return $this->variables;
     }
 
-    protected function getEntity() : Entity
+    protected function getEntity()
     {
         if (!$this->entity) {
             throw new Error('Formula: Entity required but not passed.');
diff --git a/application/Espo/Core/Notificators/Base.php b/application/Espo/Core/Notificators/Base.php
new file mode 100644
index 0000000000..6d4b6617ab
--- /dev/null
+++ b/application/Espo/Core/Notificators/Base.php
@@ -0,0 +1,37 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2020 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\Notificators;
+
+/**
+ * @deprecated
+ */
+class Base extends DefaultNotificator
+{
+}
diff --git a/application/Espo/Core/Notificators/DefaultNotificator.php b/application/Espo/Core/Notificators/DefaultNotificator.php
index 37cb4c8b6b..cfa3dfba45 100644
--- a/application/Espo/Core/Notificators/DefaultNotificator.php
+++ b/application/Espo/Core/Notificators/DefaultNotificator.php
@@ -29,8 +29,6 @@
 
 namespace Espo\Core\Notificators;
 
-use Espo\Core\Interfaces\Injectable;
-
 use Espo\ORM\Entity;
 
 use Espo\Entities\User;