diff --git a/src/editor/index.js b/src/editor/index.js
index e92227098..4db74db98 100644
--- a/src/editor/index.js
+++ b/src/editor/index.js
@@ -169,6 +169,7 @@ export default (config = {}, opts = {}) => {
      * @param {Boolean} [opts.json=false] Return an array of CssRules instead of the CSS string
      * @param {Boolean} [opts.avoidProtected=false] Don't include protected CSS
      * @param {Boolean} [opts.onlyMatched=false] Return only rules matched by the passed component.
+     * @param {Boolean} [opts.keepUnusedStyles=false] Force keep all defined rules. Toggle on in case output looks different inside/outside of the editor.
      * @returns {String|Array<CssRule>} CSS string or array of CssRules
      */
     getCss(opts) {