--- loncom/interface/lonnavmaps.pm	2018/11/13 03:59:00	1.543
+++ loncom/interface/lonnavmaps.pm	2018/12/27 20:10:31	1.544
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Navigate Maps Handler
 #
-# $Id: lonnavmaps.pm,v 1.543 2018/11/13 03:59:00 raeburn Exp $
+# $Id: lonnavmaps.pm,v 1.544 2018/12/27 20:10:31 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1933,14 +1933,20 @@ END
             if ($env{'request.course.id'}) {
                 if (($is_ssl) && ($src =~ m{^\Q/public/$cdom/$cnum/syllabus\E($|\?)}) &&
                     ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
-                    if ($hostname ne '') {
-                        $src = 'http://'.$hostname.$src;
+                    unless (&Apache::lonnet::uses_sts()) {
+                        if ($hostname ne '') {
+                            $src = 'http://'.$hostname.$src;
+                        }
+                        $src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
+                        $srcHasQuestion = 1;a
                     }
-                    $src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
-                    $srcHasQuestion = 1;
                 } elsif (($is_ssl) && ($src =~ m{^\Q/adm/wrapper/ext/\E(?!https:)})) {
-                    if ($hostname ne '') {
-                        $src = 'http://'.$hostname.$src;
+                    unless (&Apache::lonnet::uses_sts()) {
+                        if ($hostname ne '') {
+                            $src = 'http://'.$hostname.$src;
+                        }
+                        $src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
+                        $srcHasQuestion = 1;
                     }
                 }
             }