diff --git a/CHANGELOG.md b/CHANGELOG.md
index da6af86..5dc60b6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
+### Changed
+- display question mark if symbol is unknown
 
 ## 0.0.3 – 2016-12-16
 ### Added