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-rw-r--r--lib/PublicInbox/View.pm5
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/PublicInbox/View.pm b/lib/PublicInbox/View.pm
index 5baaffaf..89174296 100644
--- a/lib/PublicInbox/View.pm
+++ b/lib/PublicInbox/View.pm
@@ -10,7 +10,8 @@ use bytes (); # only for bytes::length
 use PublicInbox::MsgTime qw(msg_datestamp);
 use PublicInbox::Hval qw(ascii_html obfuscate_addrs prurl mid_href);
 use PublicInbox::Linkify;
-use PublicInbox::MID qw/id_compress mids mids_for_index references/;
+use PublicInbox::MID qw(id_compress mids mids_for_index references
+                        $MID_EXTRACT);
 use PublicInbox::MsgIter;
 use PublicInbox::Address;
 use PublicInbox::WwwStream;
@@ -299,7 +300,7 @@ sub _th_index_lite {
         if (my $smsg = $node->{smsg}) {
                 # delete saves about 200KB on a 1K message thread
                 if (my $refs = delete $smsg->{references}) {
-                        ($$irt) = ($refs =~ m/<([^>]+)>\z/);
+                        ($$irt) = ($refs =~ m/$MID_EXTRACT\z/o);
                 }
         }
         my $irt_map = $mapping->{$$irt} if defined $$irt;