diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 9af08693c77ef..4e83968fe67cb 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,7 @@
+*   PostgreSQL `Cidr#change?` detects the address prefix change.
+
+    *Taketo Takashima*
+
 *   Change `BatchEnumerator#destroy_all` to return the total number of affected rows.
 
     Previously, it always returned `nil`.