diff --git a/doc/templates/style/offline.css b/doc/templates/style/offline.css
index c59c1ff80e60e9b95e2c8418d28c307898d0430d..ce2d67db70432b8de4bd4b8fcbb3f1046820ce2f 100644
--- a/doc/templates/style/offline.css
+++ b/doc/templates/style/offline.css
@@ -487,6 +487,11 @@ border-top: 1px solid #999;
 padding-top:11px;
 }
 
+.footer a[href*="http://"], a[href*="ftp://"],a[href*="https://"]{
+background-size: 13px 11px;
+padding-left: 16px;
+}
+
 .footerNavi{
 width:auto;
 text-align:right;