diff --git a/CHANGELOG.md b/CHANGELOG.md
index ee47a943b..66f8e7f73 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 The following are the significant changes since 0.12.0-rc1.
 
+BUG FIXES:
+
+* configs/configupgrade: preserve in-line comments on lists [#21299]
 
 ## 0.12.0-rc1 (May 7, 2019)