diff --git a/CHANGELOG.md b/CHANGELOG.md
index 57f2145134..9dbc6990e9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 ## 0.12.0-rc1 (Unreleased)
 
+NEW FEATURES: 
+
+* New function `strrev`, for reversing unicode strings. [#21091]
 
 ## 0.12.0-beta2 (Apr 18, 2019)