diff --git a/lib/repo.ex b/lib/repo.ex
index 29c3099..f5be628 100644
--- a/lib/repo.ex
+++ b/lib/repo.ex
@@ -14,6 +14,8 @@ defmodule AshPostgres.Repo do
 
   Extensions that are relevant to ash_postgres:
 
+  * "ash-functions" - This isn't really an extension, but it expresses that certain functions
+    should be added when generating migrations, to support the `||` and `&&` operators in expressions.
   * `"uuid-ossp"` - Sets UUID primary keys defaults in the migration generator
   * `"pg_trgm"` - Makes the `AshPostgres.Predicates.Trigram` custom predicate available
   * "citext" - Allows case insensitive fields to be used