diff --git a/addons/web/static/src/js/core/dom.js b/addons/web/static/src/js/core/dom.js
index d2fdb41fefc..a61caf480e4 100644
--- a/addons/web/static/src/js/core/dom.js
+++ b/addons/web/static/src/js/core/dom.js
@@ -114,6 +114,7 @@ var dom = {
             borderTopWidth: 0,
             borderBottomWidth: 0,
             padding: 0,
+            overflow: 'hidden',
         });
         $fixedTextarea.data("auto_resize", true);