diff --git a/core/themes/bartik/css/components/form.css b/core/themes/bartik/css/components/form.css
index 3e46920757..1254ccd6aa 100644
--- a/core/themes/bartik/css/components/form.css
+++ b/core/themes/bartik/css/components/form.css
@@ -276,6 +276,7 @@ input.form-submit:focus {
 }
 .filter-wrapper .form-select {
   min-width: 120px;
+  border-radius: 0px;
 }
 .comment-form details.filter-wrapper .tips {
   font-size: 0.786em;