diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index a38534d..7a65454 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -19,6 +19,9 @@
   :class:`~cryptography.hazmat.backends.interfaces.TraditionalOpenSSLSerializationBackend`
   support to the :doc:`/hazmat/backends/openssl`.
 * Added :class:`~cryptography.hazmat.backends.interfaces.EllipticCurveBackend`.
+* Added :class:`~cryptography.hazmat.primitives.ciphers.modes.ECB` support
+  for :class:`~cryptography.hazmat.primitives.ciphers.algorithms.TripleDES` on
+  :doc:`/hazmat/backends/commoncrypto` and :doc:`/hazmat/backends/openssl`.
 
 0.4 - 2014-05-03
 ~~~~~~~~~~~~~~~~