diff --git a/_config/database.yml b/_config/database.yml
index 916dd2c57..86cc2e927 100644
--- a/_config/database.yml
+++ b/_config/database.yml
@@ -14,3 +14,9 @@ Injector:
       connector: %$MySQLiConnector
       schemaManager: %$MySQLSchemaManager
       queryBuilder: %$MySQLQueryBuilder
+  MySQLiConnector:
+    class: 'MySQLiConnector'
+    type: prototype
+  PDOConnector:
+    class: 'PDOConnector'
+    type: prototype