diff --git a/oni-gnus.el b/oni-gnus.el
index ef6bbc2..4469fd3 100644
--- a/oni-gnus.el
+++ b/oni-gnus.el
@@ -4,7 +4,7 @@
 
 ;; Author: Tom Willemse <tom@ryuslash.org>
 ;; Keywords: local
-;; Version: 2020.0423.103027
+;; Version: 2021.0425.174415
 ;; Package-Requires: (oni-data-dir)
 
 ;; This program is free software; you can redistribute it and/or modify
@@ -67,6 +67,8 @@ Do this N times."
 (setq gnus-select-method
       '(nnmaildir "ryuslash" (directory "~/documents/mail/ryuslash/")))
 
+(setq gnus-summary-thread-gathering-function 'gnus-gather-threads-by-references)
+
 (add-to-list 'gnus-posting-styles
              '(".*"
                (address "tom@ryuslash.org")