diff --git a/scss/mixins/_forms.scss b/scss/mixins/_forms.scss
index c8aea9669d..40f1b3de42 100644
--- a/scss/mixins/_forms.scss
+++ b/scss/mixins/_forms.scss
@@ -14,7 +14,9 @@
   }
 
   // Set the border and box shadow on specific inputs to match
-  .form-control {
+  .form-control,
+  .custom-select,
+  .custom-file-control {
     border-color: $color;
 
     &:focus {