diff --git a/CHANGELOG.md b/CHANGELOG.md
index 142ca90ffa8..31f7fbf0349 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,3 +8,4 @@
 - Default enables experiment to skip deploying unmodified functions (#5192)
 - Default enables experiment to allow parameterized functions codebases (#5192)
 - Fixes parallel requests in the functions emulator (#5149).
+- Unspecified functions concurrency will shift between the defaults of 1 or 80 when CPU is changed to support/not support concurrency (#5196)