diff --git a/CHANGELOG.md b/CHANGELOG.md
index b96466aa..b3de222f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ Bug Fixes
 
 - Fix `input-port?`, `output-port?`, `input-port-open?`, and `output-port-open?` to return `#f` instead of raising an error when a non-port object is passed.
 - Fix overflow detection when performing fixnum multiplication to avoid undefined behavior in the C runtime.
+- Prevent warnings from the C compiler regarding `shifting a negative signed value is undefined`.
 
 ## 0.9.2 - August 26, 2018