diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8464b93e7..deb3f995b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ The format is loosely based on [Keep a Changelog](http://keepachangelog.com/en/1
 #### Fixed
 
 * AmbiguousMatchException when setting up the property, that hides another one (@ishatalkin, #939)
+* `ArgumentException` ("Interface not found") when setting up `object.ToString` on an interface mock (@vslynko, #942)
 
 ## 4.13.0 (2019-08-31)