diff --git a/html/inc/boinc_db.inc b/html/inc/boinc_db.inc
index cba49d4b81..d9a3d0f20d 100644
--- a/html/inc/boinc_db.inc
+++ b/html/inc/boinc_db.inc
@@ -100,7 +100,7 @@ class BoincDb extends DbConn {
 
     static function escape_string($string) {
         $db = self::get();
-        return parent::base_escape_string(trim($string));
+        return $db->base_escape_string(trim($string));
     }
     static function error() {
         $db = self::get();