--- loncom/interface/londocs.pm	2014/12/04 14:27:06	1.589
+++ loncom/interface/londocs.pm	2014/12/20 20:32:33	1.590
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Documents
 #
-# $Id: londocs.pm,v 1.589 2014/12/04 14:27:06 raeburn Exp $
+# $Id: londocs.pm,v 1.590 2014/12/20 20:32:33 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -5838,6 +5838,7 @@ sub editing_js {
             if (&Apache::lonnet::is_on_map($res)) {
                 $backtourl = &HTML::Entities::encode(&Apache::lonnet::clutter($res),'<>&"').'?symb='.
                              &HTML::Entities::encode($caller,'<>&"');
+                $backtourl = &Apache::loncommon::escape_single($backtourl);
             } else {
                 $backtourl = '/adm/navmaps';
             }