fix changelog to link to hkdfexpand
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index f570281..9342398 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -6,7 +6,7 @@
.. note:: This version is not yet released and is under active development.
-* Added :class:`~cryptography.hazmat.primitives.HKDFExpand`.
+* Added :class:`~cryptography.hazmat.primitives.kdf.hkdf.HKDFExpand`.
* Added :class:`~cryptography.hazmat.primitives.ciphers.modes.CFB8` support
for :class:`~cryptography.hazmat.primitives.ciphers.algorithms.AES` and
:class:`~cryptography.hazmat.primitives.ciphers.algorithms.TripleDES` on