Index: openacs-4/packages/acs-subsite/www/register/user-join.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-subsite/www/register/user-join.tcl,v
diff -u -r1.13 -r1.14
--- openacs-4/packages/acs-subsite/www/register/user-join.tcl	27 Oct 2014 16:40:01 -0000	1.13
+++ openacs-4/packages/acs-subsite/www/register/user-join.tcl	22 Jun 2015 21:03:13 -0000	1.14
@@ -34,8 +34,8 @@
 set join_policy $group_info(join_policy)
 
 
-if { ([info exists return_url] && $return_url ne "") } {
-    set ret_link "<a href=\"$return_url\">Return to previous page.</a>"
+if { $return_url ne "" } {
+    set ret_link [subst {<a href="[ns_quotehtml $return_url]">Return to previous page.</a>}]
 } else {
     set ret_link ""
 }