diff --git a/scss/_dropdown.scss b/scss/_dropdown.scss
index f50af30477..3b0df96d86 100644
--- a/scss/_dropdown.scss
+++ b/scss/_dropdown.scss
@@ -28,7 +28,7 @@
   .dropdown-toggle {
     &:after {
       border-bottom: $caret-width solid;
-      border-top: none;
+      border-top: 0;
     }
   }
 }