diff --git a/CHANGES.txt b/CHANGES.txt
index 488c38c7bd..00232abc38 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,6 +1,9 @@
 unreleased
 ==========
 
+- Deprecated support for Python 3.3.
+  https://github.com/Pylons/pyramid/issues/2477
+
 - A new event and interface (BeforeTraversal) has been introduced that will
   notify listeners before traversal starts in the router. See
   https://github.com/Pylons/pyramid/pull/2469 and