diff --git a/scss/_forms.scss b/scss/_forms.scss
index 2023aa0134..34a6fef63f 100644
--- a/scss/_forms.scss
+++ b/scss/_forms.scss
@@ -136,6 +136,8 @@ select.form-control {
   padding-top: $input-padding-y;
   padding-bottom: $input-padding-y;
   line-height: $input-line-height;
+  border: solid transparent;
+  border-width: 1px 0;
 
   &.form-control-sm,
   &.form-control-lg {