diff --git a/addons/web_editor/static/src/js/backend/convert_inline.js b/addons/web_editor/static/src/js/backend/convert_inline.js
index 0974748bd9f..e71b4bda640 100644
--- a/addons/web_editor/static/src/js/backend/convert_inline.js
+++ b/addons/web_editor/static/src/js/backend/convert_inline.js
@@ -284,7 +284,7 @@ function classToStyle($editable, cssRules) {
         const $target = $(node);
         const css = _getMatchedCSSRules(node, cssRules);
         // Flexbox
-        for (const styleName in node.style) {
+        for (const styleName of node.style) {
             if (styleName.includes('flex') || `${node.style[styleName]}`.includes('flex')) {
                 node.style[styleName] = '';
             }