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 2ca27272ea6..fa48a92208c 100644
--- a/addons/web_editor/static/src/js/backend/convert_inline.js
+++ b/addons/web_editor/static/src/js/backend/convert_inline.js
@@ -154,6 +154,7 @@ function getMatchedCSSRules(a) {
         delete style['text-decoration-line'];
         delete style['text-decoration-color'];
         delete style['text-decoration-style'];
+        delete style['text-decoration-thickness'];
     }
 
     // text-align inheritance does not seem to get past <td> elements on some