diff --git a/ejabberd.yml.example b/ejabberd.yml.example
index 27cf8e4c5..eaf0584fa 100644
--- a/ejabberd.yml.example
+++ b/ejabberd.yml.example
@@ -227,6 +227,7 @@ modules:
     ip_access: trusted_network
   mod_roster:
     versioning: true
+  mod_s2s_bidi: {}
   mod_s2s_dialback: {}
   mod_shared_roster: {}
   mod_stream_mgmt: