Added missing exception to documentation
diff --git a/docs/hazmat/primitives/key-derivation-functions.rst b/docs/hazmat/primitives/key-derivation-functions.rst
index 11fbd4e..fdc540b 100644
--- a/docs/hazmat/primitives/key-derivation-functions.rst
+++ b/docs/hazmat/primitives/key-derivation-functions.rst
@@ -276,12 +276,16 @@
:raises cryptography.exceptions.UnsupportedAlgorithm: This is raised if the
provided ``backend`` does not implement
:class:`~cryptography.hazmat.backends.interfaces.HMACBackend`
+ :raises TypeError: This is raised if the provided ``info`` is a unicode object
.. method:: derive(key_material)
:param bytes key_material: The input key material.
:return bytes: The derived key.
+ :raises TypeError: This is raised if the provided ``key_material`` is
+ a unicode object
+
Derives a new key from the input key material by performing both the
extract and expand operations.
@@ -300,6 +304,8 @@
:meth:`verify` is
called more than
once.
+ :raises TypeError: This is raised if the provided ``key_material`` is
+ a unicode object
This checks whether deriving a new key from the supplied
``key_material`` generates the same key as the ``expected_key``, and