diff --git a/CHANGELOG.md b/CHANGELOG.md
index 37276af..7ee5cc5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 # Changes
 
 ## Unreleased ~ master ~ 2.0-dev
+ - Change behaviour of the `cow!` macro
  - Add `rwlock!` macro to create `RwLock` types
  - Remove haskell-like and python-like comprehension syntax
  - Re-implement comprehensions based on the `c!` macro