--- loncom/lonnet/perl/lonnet.pm	2013/02/02 03:29:33	1.1211
+++ loncom/lonnet/perl/lonnet.pm	2013/02/05 21:32:49	1.1212
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1211 2013/02/02 03:29:33 raeburn Exp $
+# $Id: lonnet.pm,v 1.1212 2013/02/05 21:32:49 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -634,6 +634,13 @@ sub check_for_valid_session {
 	|| !defined($disk_env{'user.domain'})) {
 	return undef;
     }
+    if ($r->user() eq '') {
+        if ($disk_env{'user.domain'} eq $r->dir_config('lonDefDomain')) {
+            $r->user($disk_env{'user.name'});
+        } else {
+            $r->user($disk_env{'user.name'}.':'.$disk_env{'user.domain'});
+        }
+    }
     return $handle;
 }