1 files changed, 2 insertions, 2 deletions
diff --git a/lib/PublicInbox/Search.pm b/lib/PublicInbox/Search.pm
index c18e19d4..4cfb7b38 100644
--- a/lib/PublicInbox/Search.pm
+++ b/lib/PublicInbox/Search.pm
@@ -18,9 +18,9 @@ use constant {
          # added for public-inbox 1.6.0+
          BYTES => 3, # IMAP RFC822.SIZE
          UID => 4, # IMAP UID == NNTP article number == Xapian docid
+        THREADID => 5, # RFC 8474, RFC 8621
  
          # TODO
-        # THREADID => ?
          # REPLYCNT => ?, # IMAP ANSWERED
  
          # SCHEMA_VERSION history
@@ -47,7 +47,7 @@ use constant {
          #      public-inbox v1.5.0 adds (still SCHEMA_VERSION=15):
          #      * "lid:" and "l:" for List-Id searches
          #
-        #      v1.6.0 adds BYTES and UID values
+        #      v1.6.0 adds BYTES, UID and THREADID values
          SCHEMA_VERSION => 15,
  };