diff --git a/ACU/Trace.pm b/ACU/Trace.pm
index e8e8a43..8abed90 100644
--- a/ACU/Trace.pm
+++ b/ACU/Trace.pm
@@ -501,8 +501,8 @@ sub toString($$)
     if (defined $self->{who})
     {
 	my $w = $doc->createElement("who");
-	$w->setAttribute("login", $self->{who}{login});
 	$w->setAttribute("type", $self->{who}{type}) if (defined $self->{who}{type});
+	$w->appendTextNode( $self->{who}{login} );
 	$e->appendChild( $w );
     }