diff --git a/docs/_static/zmstyle.css b/docs/_static/zmstyle.css
index 6d5815c63..986614fa6 100644
--- a/docs/_static/zmstyle.css
+++ b/docs/_static/zmstyle.css
@@ -11,7 +11,6 @@ img {
   }
 
   a.reference.external:link, 
-  a.reference.external:visited, 
   a.reference.external:visited{
     background: url('./Icon_External_Link.png')     center right no-repeat;
     padding-right: 13px;