--- loncom/interface/lonprintout.pm	2017/01/29 23:34:58	1.654
+++ loncom/interface/lonprintout.pm	2017/01/29 23:53:55	1.655
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Printout
 #
-# $Id: lonprintout.pm,v 1.654 2017/01/29 23:34:58 raeburn Exp $
+# $Id: lonprintout.pm,v 1.655 2017/01/29 23:53:55 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -40,6 +40,7 @@ use Apache::admannotations;
 use Apache::lonenc;
 use Apache::entities;
 use Apache::londefdef;
+use LONCAPA;
 # use Apache::structurelags;	# for language management.
 
 use File::Basename;
@@ -3536,7 +3537,7 @@ ENDPART
 				'cgi.'.$identifier.'.role' => $perm{'pav'},
 				'cgi.'.$identifier.'.numberoffiles' => $#print_array,
 				'cgi.'.$identifier.'.studentnames' => $student_names,
-				'cgi.'.$identifier.'.backref' => $URLback,});
+				'cgi.'.$identifier.'.backref' => &escape($URLback),});
     &Apache::lonnet::appenv({"cgi.$identifier.user"    => $env{'user.name'},
 				"cgi.$identifier.domain"  => $env{'user.domain'},
 				"cgi.$identifier.courseid" => $cnum,