diff --git a/CHANGELOG.md b/CHANGELOG.md
index c98034737d21586c43de135c22bf51c3df4c8098..7b1ef53adea174a8910aba8c97b3940af9e0d32b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@ API-breaking change is listed.
 
 ## std++ master
 
-- Rename `drop_length` into `drop_length_gt` and add `drop_length_le`.
+- Rename `drop_insert` into `drop_insert_gt` and add `drop_insert_le`.
 
 ## std++ 1.3 (released 2020-03-18)