lib/PublicInbox/LeiMirror.pm | 2 +-
 t/lei-mirror.t               | 8 ++++++++

diff --git a/lib/PublicInbox/LeiMirror.pm b/lib/PublicInbox/LeiMirror.pm
index fca11ccff037cae4d5b1f4b37e609c36733629fa..638add421d61df703001f753b0a9d9e426c609f6 100644
--- a/lib/PublicInbox/LeiMirror.pm
+++ b/lib/PublicInbox/LeiMirror.pm
@@ -16,7 +16,7 @@ 	my $f = "$mrr->{dst}/mirror.done";
 	if ($?) {
 		$lei->child_error($?);
 	} elsif (!unlink($f)) {
-		$lei->err("unlink($f): $!");
+		$lei->err("unlink($f): $!") unless $!{ENOENT};
 	} else {
 		$lei->add_external_finish($mrr->{dst});
 		$lei->qerr("# mirrored $mrr->{src} => $mrr->{dst}");
diff --git a/t/lei-mirror.t b/t/lei-mirror.t
index 65b6068ccb917af1ef7992eed14d6276ecd916af..a61a756596fc5b6c14d4db511c37664108af62eb 100644
--- a/t/lei-mirror.t
+++ b/t/lei-mirror.t
@@ -47,6 +47,14 @@
 	lei_ok('add-external', "$t1-pfx", '--mirror', "$http/pfx/t1/",
 			\'--mirror v1 w/ PSGI prefix');
 
+	my $d = "$home/404";
+	ok(!lei(qw(add-external --mirror), "$http/404", $d), 'mirror 404');
+	unlike($lei_err, qr!unlink.*?404/mirror\.done!,
+		'no unlink failure message');
+	ok(!-d $d, "`404' dir not created");
+	lei_ok('ls-external');
+	unlike($lei_out, qr!\Q$d\E!s, 'not added to ls-external');
+
 	my %phail = (
 		HTTPS => 'https://public-inbox.org/' . 'phail',
 		ONION =>