--- loncom/auth/lonacc.pm	2013/01/30 16:23:47	1.142
+++ loncom/auth/lonacc.pm	2013/02/05 21:32:45	1.143
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Cookie Based Access Handler
 #
-# $Id: lonacc.pm,v 1.142 2013/01/30 16:23:47 raeburn Exp $
+# $Id: lonacc.pm,v 1.143 2013/02/05 21:32:45 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -275,9 +275,9 @@ sub sso_login {
     my ($r,$handle) = @_;
 
     my $lonidsdir=$r->dir_config('lonIDsDir');
-    if (!($r->user 
-	  && (!defined($env{'user.name'}) && !defined($env{'user.domain'}))
-	  && ($handle eq ''))) {
+    if (($r->user eq '') ||
+        (defined($env{'user.name'}) && (defined($env{'user.domain'}))
+	  && ($handle ne ''))) {
 	# not an SSO case or already logged in
 	return undef;
     }