diff --git a/CHANGELOG.md b/CHANGELOG.md
index 73928b0f..d2c67a38 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,11 @@ Rhai Release Notes
 Version 1.0.5
 =============
 
+Bug fixes
+---------
+
 * `FloatWrapper` is no longer erroneously exported under `no_float+internals`.
+* The `sign` function now works properly for float values that are `NaN`.
 
 
 Version 1.0.4