diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/includes/opac-bottom.inc b/koha-tmpl/opac-tmpl/bootstrap/en/includes/opac-bottom.inc
index 8b8d9ddf6e..d528879d24 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/includes/opac-bottom.inc
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/includes/opac-bottom.inc
@@ -195,7 +195,7 @@ $.widget.bridge('uitooltip', $.ui.tooltip);
         return false;
     });
     $("#ulactioncontainer > ul > li > a.addtoshelf").on("click",function(){
-        Dopop('opac-addbybiblionumber.pl?biblionumber=[% biblionumber | html %]');
+        Dopop('opac-addbybiblionumber.pl?biblionumber=[% biblionumber | uri %]');
         return false;
     });
     $("body").on("click", ".addtocart", function(e){