diff --git a/src/scale/ScaleManager.js b/src/scale/ScaleManager.js
index 08f1d8489..f3bbcb59c 100644
--- a/src/scale/ScaleManager.js
+++ b/src/scale/ScaleManager.js
@@ -1457,6 +1457,7 @@ var ScaleManager = new Class({
      * Triggered when a fullscreenchange event is dispatched by the DOM.
      *
      * @method Phaser.Scale.ScaleManager#onFullScreenChange
+     * @protected
      * @since 3.16.0
      */
     onFullScreenChange: function ()