diff --git a/SeedDMS_Core/Core/inc.ClassDocument.php b/SeedDMS_Core/Core/inc.ClassDocument.php
index 3f12aab82..35f93b017 100644
--- a/SeedDMS_Core/Core/inc.ClassDocument.php
+++ b/SeedDMS_Core/Core/inc.ClassDocument.php
@@ -2763,7 +2763,7 @@ class SeedDMS_Core_Document extends SeedDMS_Core_Object { /* {{{ */
 			return false;
 
 		foreach ($resArr as $row) {
-			$date = date('Y-m-d H:i:s', $row['date']);
+			$date = date('Y-m-d H:i:s', (int) $row['date']);
 			$timeline[] = array('date'=>$date, 'msg'=>'Added attachment "'.$row['name'].'"', 'document'=>$this, 'type'=>'add_file', 'fileid'=>$row['id']);
 		}