diff --git a/standards/templates/standards/standards_single.html b/standards/templates/standards/standards_single.html
index 602502d..a828561 100644
--- a/standards/templates/standards/standards_single.html
+++ b/standards/templates/standards/standards_single.html
@@ -141,7 +141,7 @@
               {% getNCFileInfosURL request file.nc_id as filelink %}
               {% getNCDirInfosURL request file.nc_id as dirlink %}      
               {% getNextcloudURL as nc_url %}
-              <a href="{{nc_url}}apps/files/?dir=/{{dirlink}}&openfile={{file.nc_id}}" target="_blank">{{filename|truncatechars:30}}</a>
+              <a href="{{nc_url}}apps/files/?dir=/{{dirlink}}&amp;openfile={{file.nc_id}}" target="_blank">{{filename|truncatechars:30}}</a>
               <br />
             {% endfor %}
           </p>