diff --git a/CHANGELOG.md b/CHANGELOG.md
index a2c9a8a5..37a71497 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 All notable changes to this project will be documented in this file.
 
 ## 0.4.0 - ??
+- Remove `callable?`.
 - Remove `tuple/append` and `tuple/prepend`, which may have seened like `O(1)`
   operations. Instead, use the `splice` special to extend tuples.
 - Add `-m` flag to main client to allow specifying where to load