diff --git a/bin/sync-slave b/bin/sync-slave
index 2738157..d650c4b 100755
--- a/bin/sync-slave
+++ b/bin/sync-slave
@@ -62,7 +62,11 @@ sub do_rewrite {
     
     foreach my $i (sort {$a->{zone} cmp $b->{zone}} @vh) {
 	next if ($i->{type} eq '_dnssec');
-	print $fh "zone \"$i->{zone}\" { type slave; file \"/var/cache/bind/db.$i->{zone}\"; masters { $i->{master}; }; };\n";
+	if ($ddns->is_dnssec($i->{zone})) {
+	    print $fh "zone \"$i->{zone}\" { type slave; file \"/var/cache/bind/db.$i->{zone}.signed\"; masters { $i->{master}; }; };\n";
+	} else {
+	    print $fh "zone \"$i->{zone}\" { type slave; file \"/var/cache/bind/db.$i->{zone}\"; masters { $i->{master}; }; };\n";
+	}
     }
     close $fh;
     print "Installing new slave host list\n";