diff --git a/inc/inc.ClassSettings.php b/inc/inc.ClassSettings.php
index 5769540a1..b7e2181a9 100644
--- a/inc/inc.ClassSettings.php
+++ b/inc/inc.ClassSettings.php
@@ -13,6 +13,7 @@
 
 namespace Seeddms\Seeddms;
 
+use PDO;
 use SeedDMS_Core_File;
 use SeedDMS_Core_DMS;
 use SeedDMS_Core_DatabaseAccess;