diff --git a/css/plugins/sitemapnavi.less b/css/plugins/sitemapnavi.less
index cd6026d..863a571 100644
--- a/css/plugins/sitemapnavi.less
+++ b/css/plugins/sitemapnavi.less
@@ -10,6 +10,10 @@
     li {
         line-height: @line-height-bigger;
     }
+
+    li li {
+        margin-left: 0.75em;
+    }
 }
 
 .wide-content #plugin__sitemapnavi {