lib/PublicInbox/Thread.pm | 7 -------
 lib/PublicInbox/View.pm   | 9 ++++++++-

diff --git a/lib/PublicInbox/Thread.pm b/lib/PublicInbox/Thread.pm
index a3dedf541cb592a0e23182ac5c7dbd91736d49ca..781fffff2d5806d05390b66288c413a011745590 100644
--- a/lib/PublicInbox/Thread.pm
+++ b/lib/PublicInbox/Thread.pm
@@ -17,13 +17,6 @@ if ($Mail::Thread::VERSION <= 2.55) {
 	eval q(sub _container_class { 'PublicInbox::Thread::Container' });
 }
 
-sub sort_ts {
-	sort {
-		(eval { $a->topmost->message->header('X-PI-TS') } || 0) <=>
-		(eval { $b->topmost->message->header('X-PI-TS') } || 0)
-	} @_;
-}
-
 package PublicInbox::Thread::Container;
 use strict;
 use warnings;
diff --git a/lib/PublicInbox/View.pm b/lib/PublicInbox/View.pm
index ee5ba20e2a91e7b15dfd1ae6e3243fad167ba294..68adbd72840592dccb87cc1e37c151eb4b4795c9 100644
--- a/lib/PublicInbox/View.pm
+++ b/lib/PublicInbox/View.pm
@@ -662,7 +662,7 @@ 	my $th = PublicInbox::Thread->new(@$msgs);
 	no warnings 'once';
 	$Mail::Thread::nosubject = $nosubject;
 	$th->thread;
-	$th->order(*PublicInbox::Thread::sort_ts);
+	$th->order(*sort_ts);
 	$th
 }
 
@@ -745,6 +745,13 @@ 				"$html</a>&gt;]\n";
 	}
 	inline_dump($dst, $state, $upfx, $node->child, $level+1);
 	inline_dump($dst, $state, $upfx, $node->next, $level);
+}
+
+sub sort_ts {
+	sort {
+		(eval { $a->topmost->message->header('X-PI-TS') } || 0) <=>
+		(eval { $b->topmost->message->header('X-PI-TS') } || 0)
+	} @_;
 }
 
 sub rsort_ts {