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diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index a017ac6f18..6b04a2d6a3 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,13 @@
+*   Add expression support on the schema default.
+
+    Example:
+
+        create_table :posts do |t|
+          t.datetime :published_at, default: -> { 'NOW()' }
+        end
+
+    *Ryuta Kamizono*
+
 *   Fix regression when loading fixture files with symbol keys.
 
     Fixes #22584.