diff --git a/scss/_forms.scss b/scss/_forms.scss
index b0954f8c2f49..8835595e7344 100644
--- a/scss/_forms.scss
+++ b/scss/_forms.scss
@@ -302,7 +302,8 @@ select.form-control-lg {
       display: inline-block;
     }
 
-    .input-group {
+    .input-group,
+    .custom-select {
       width: auto;
     }