diff --git a/developer_manual/app/container.rst b/developer_manual/app/container.rst
index 8774489a1..0fff10956 100644
--- a/developer_manual/app/container.rst
+++ b/developer_manual/app/container.rst
@@ -294,7 +294,6 @@ Types:
 * **OCP\\AppFramework\\Utility\\IControllerMethodReflector**
 * **OCP\\Contacts\\IManager**
 * **OCP\\IDateTimeZone**
-* **OCP\\IDb**
 * **OCP\\IDBConnection**
 * **OCP\\Diagnostics\\IEventLogger**
 * **OCP\\Diagnostics\\IQueryLogger**
diff --git a/developer_manual/app/tutorial.rst b/developer_manual/app/tutorial.rst
index 84fc75204..bee64f1ac 100644
--- a/developer_manual/app/tutorial.rst
+++ b/developer_manual/app/tutorial.rst
@@ -310,12 +310,12 @@ Entities are returned from so called :doc:`Mappers <database>`. Let's create one
     <?php
     namespace OCA\OwnNotes\Db;
 
-    use OCP\IDb;
+    use OCP\IDbConnection;
     use OCP\AppFramework\Db\Mapper;
 
     class NoteMapper extends Mapper {
 
-        public function __construct(IDb $db) {
+        public function __construct(IDbConnection $db) {
             parent::__construct($db, 'ownnotes_notes', '\OCA\OwnNotes\Db\Note');
         }