diff --git a/addons/web/static/src/js/view_form.js b/addons/web/static/src/js/view_form.js
index 5ecad26e5df..76ddeb86acf 100644
--- a/addons/web/static/src/js/view_form.js
+++ b/addons/web/static/src/js/view_form.js
@@ -3321,7 +3321,7 @@ instance.web.form.FieldOne2Many = instance.web.form.AbstractField.extend({
                         e.cancel = true;
                     });
                     _(controller.columns).find(function (column) {
-                        if (!column instanceof instance.web.list.Handle) {
+                        if (!(column instanceof instance.web.list.Handle)) {
                             return false;
                         }
                         column.modifiers.invisible = true;