diff --git a/doc/system/changes.adoc b/doc/system/changes.adoc
index 851fa85..513372e 100644
--- a/doc/system/changes.adoc
+++ b/doc/system/changes.adoc
@@ -16,6 +16,7 @@ https://www.boost.org/LICENSE_1_0.txt
   to avoid the one-time allocation that shows up on leak checkers.
 * Added a constructor that allows replacing the source location of an
   `error_code`, and a corresponding `assign`.
+* Added a converting constructor to `result`.
 
 ## Changes in Boost 1.79