diff --git a/NEWS b/NEWS
index f0379065..014d8c02 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,8 @@ Current release
 What's new in psycopg 2.6.3
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+- Throw an exception trying to pass ``NULL`` chars as parameters
+  (:ticket:`#420).
 - Make `~psycopg2.extras.Range` objects picklable (:ticket:`#462`).