diff --git a/README.md b/README.md
index 0a43ec2aff..573534affa 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,9 @@ instead, use merge (fast-forward, if possible, with merge commit otherwise).
 - Environment variable `MASTODON_USE_LIBVIPS` is true by default.
   - This is a minor change, but it _requires_ all systems running Catstodon to run a recent libvips version (8.13+).
   - Vanilla Mastodon intends to deprecate ImageMagick anyway, so sooner or later, this change will cease being one.
+- Allow dashes in emoji shortcodes
+  - This is simply to allow custom emoji compat with other fedi software.
+  - Original patch by hazycora: https://github.com/TheEssem/mastodon/commit/2dde7a25a47a23f827e2fd2d07f55438f9985181
 
 ## Previous differences now merged into glitch-soc