diff --git a/lib/rdoc/generator/template/aliki/css/rdoc.css b/lib/rdoc/generator/template/aliki/css/rdoc.css
index 348746c168..83b0e518f2 100644
--- a/lib/rdoc/generator/template/aliki/css/rdoc.css
+++ b/lib/rdoc/generator/template/aliki/css/rdoc.css
@@ -864,11 +864,6 @@ nav a:hover {
   }
 }
 
-nav ul li details {
-  position: relative;
-  padding-right: 1.5em;  /* Add space for the marker on the right */
-}
-
 nav ul li details > summary {
   list-style: none;  /* Remove the default marker */
   position: relative; /* So that the open/close triangle can position itself absolutely inside */