diff --git a/CHANGELOG b/CHANGELOG
index ab352ff98..a2739b94a 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,9 @@
 #Nmap Changelog ($Id$); -*-text-*-
 
+o [GH#1204] Nmap could be fooled into ignoring TCP response packets if they
+  used an unknown TCP Option, which would misalign the validation, causing it
+  to fail. [Clément Notin, Daniel Miller]
+
 o [NSE][GH#1169][GH#1170][GH#1171]][GH#1198] Parser for HTTP Set-Cookie header
   is now more compliant with RFC 6265:
   - empty attributes are tolerated