diff --git a/packages/combo-box/src/vaadin-combo-box-mixin.js b/packages/combo-box/src/vaadin-combo-box-mixin.js
index bd2bfa94f88..ef99eee674b 100644
--- a/packages/combo-box/src/vaadin-combo-box-mixin.js
+++ b/packages/combo-box/src/vaadin-combo-box-mixin.js
@@ -453,6 +453,7 @@ export const ComboBoxMixin = (subclass) =>
     /**
      * Override LitElement lifecycle callback to handle filter property change.
      * @param {Object} props
+     * @protected
      */
     updated(props) {
       super.updated(props);