diff --git a/interface/web/sites/database_user_del.php b/interface/web/sites/database_user_del.php
index d80ba4f056f14c4399f8e1fd0147b0303394fec1..379a9a179b0a1a11d712dead634c5fe82665f5b9 100644
--- a/interface/web/sites/database_user_del.php
+++ b/interface/web/sites/database_user_del.php
@@ -55,7 +55,7 @@ class page_action extends tform_actions {
 		$old_record = $app->tform->getDataRecord($this->id);
 
 		/* we cannot use datalogDelete here, as we need to set server_id to 0 */
-		$app->db->query("DELETE FROM `web_database_user` WHERE ?? = ?", $index_field, $index_value);
+		$app->db->query("DELETE FROM `web_database_user` WHERE `database_user_id` = ?", $this->id);
 		$new_rec = array();
 		$old_record['server_id'] = 0;
 		$app->db->datalogSave('web_database_user', 'DELETE', 'database_user_id', $this->id, $old_record, $new_rec);