Index: lib/Net/LDAP/Filter.pm
===================================================================
--- lib/Net/LDAP/Filter.pm	(revision 520)
+++ lib/Net/LDAP/Filter.pm	(working copy)
@@ -88,7 +88,7 @@
   $_[0];
 }
 
-sub _escape { (my $t = $_[0]) =~ s/([\\\(\)\*\0-\37])/sprintf("\\%02x",ord($1))/sge; $t }
+sub _escape { (my $t = $_[0]) =~ s/([\\\(\)\*\0-\37\177-\377])/sprintf("\\%02x",ord($1))/sge; $t }
 
 sub _encode {
   my($attr,$op,$val) = @_;