lib/PublicInbox/SearchIdx.pm |  1 +
 t/psgi_v2.t                  | 11 +++++++++--

diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index fd76627791f681cb20ff545d0496ea10ccd35284..0b1dc219ba45922334ebc9a4ebdf3722b860cbe7 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -331,6 +331,7 @@ 		foreach my $mid (@$mids) {
 			$tg->index_text($mid, 1, 'XM');
 		}
 		$smsg->{to} = $smsg->{cc} = '';
+		PublicInbox::OverIdx::parse_references($smsg, $mid0, $mids);
 		my $data = $smsg->to_doc_data($oid, $mid0);
 		$doc->set_data($data);
 		if (my $altid = $self->{-altid}) {
diff --git a/t/psgi_v2.t b/t/psgi_v2.t
index faa139fb7aa2a64ae0405d5124071ce271e995b7..65448dc435a3d9925942233c60f4fd98e3243d72 100644
--- a/t/psgi_v2.t
+++ b/t/psgi_v2.t
@@ -113,6 +113,7 @@ 	like($raw, qr/^hello world!$/m, 'got second message');
 	like($raw, qr/^hello ghosts$/m, 'got third message');
 	@from_ = ($raw =~ m/^From /mg);
 	is(scalar(@from_), 3, 'three From_ lines');
+	$config->each_inbox(sub { $_[0]->search->reopen });
 
 	SKIP: {
 		eval { require IO::Uncompress::Gunzip };
@@ -129,7 +130,6 @@ 		@from_ = ($out =~ m/^From /mg);
 		is(scalar(@from_), 3, 'three From_ lines in t.mbox.gz');
 
 		# search interface
-		$config->each_inbox(sub { $_[0]->search->reopen });
 		$res = $cb->(POST('/v2test/?q=m:a-mid@b&x=m'));
 		$in = $res->content;
 		$status = IO::Uncompress::Gunzip::gunzip(\$in => \$out);
@@ -150,6 +150,13 @@ 		@from_ = ($out =~ m/^From /mg);
 		is(scalar(@from_), 3, 'three From_ lines in all.mbox');
 	};
 
+	$res = $cb->(GET('/v2test/?q=m:a-mid@b&x=t'));
+	is($res->code, 200, 'success with threaded search');
+	my $raw = $res->content;
+	ok($raw =~ s/\A.*>Results 1-3 of 3<//s, 'got all results');
+	my @over = ($raw =~ m/\d{4}-\d+-\d+\s+\d+:\d+ (.+)$/gm);
+	is_deeply(\@over, [ '<a', '` <a', '` <a' ], 'threaded messages show up');
+
 	local $SIG{__WARN__} = 'DEFAULT';
 	$res = $cb->(GET('/v2test/a-mid@b/'));
 	$raw = $res->content;
@@ -183,7 +190,7 @@
 	$res = $cb->(GET('/v2test/reuse@mid/T/'));
 	$raw = $res->content;
 	like($raw, qr/\b4\+ messages\b/, 'thread overview shown with /T/');
-	my @over = ($raw =~ m/^\d{4}-\d+-\d+\s+\d+:\d+ (.+)$/gm);
+	@over = ($raw =~ m/^\d{4}-\d+-\d+\s+\d+:\d+ (.+)$/gm);
 	is_deeply(\@over, [ '<a', '` <a', '` <a', '` <a' ],
 		'duplicate messages share the same root');