diff --git a/CHANGELOG b/CHANGELOG
index 60da9f531..9f2f24e81 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -60,6 +60,7 @@ CHANGELOG Roundcube Webmail
 - Fix so untagged COPYUID responses are also supported according to RFC6851 (#5982)
 - Fix issue caused by non-default session.cookie_lifetime setting (#5961)
 - Fix Edge encoding bug when pasting text into the HTML editor, update to TinyMCE 4.5.8 (#5885)
+- Fix handling of unknown Content-Disposition type (#6002)
 
 RELEASE 1.3.1
 -------------