diff --git a/jquery/sass/_sm-dox.scss b/jquery/sass/_sm-dox.scss
index 0c87f1a..4592554 100644
--- a/jquery/sass/_sm-dox.scss
+++ b/jquery/sass/_sm-dox.scss
@@ -455,7 +455,7 @@ $sm-dox__toggle-spacing: floor($sm-dox__main-row-height * 0.1);
             border-color: transparent transparent $sm-dox__desktop-sub-item-color transparent;
         }
         span.scroll-down-arrow {
-            @extend span.scroll-up-arrow;
+            @extend .scroll-up-arrow;
             top: 8px;
             border-style: solid dashed dashed dashed;
             border-color: $sm-dox__desktop-sub-item-color transparent transparent transparent;