Some cleanups
diff --git a/docs/hazmat/primitives/key-derivation-functions.rst b/docs/hazmat/primitives/key-derivation-functions.rst
index 10b806e..4d95629 100644
--- a/docs/hazmat/primitives/key-derivation-functions.rst
+++ b/docs/hazmat/primitives/key-derivation-functions.rst
@@ -519,7 +519,7 @@
SECG in `SEC 1 v2.0`_ recommends that
:class:`~cryptography.hazmat.primitives.kdf.concatkdf.ConcatKDFHash` be
used for new projects. This KDF should only be used for backwards
- compatibility with pre-existing implementations.
+ compatibility with pre-existing protocols.
.. warning::