Fixed #2700 -- corrtected the create_hmac_ctx interface docs
diff --git a/docs/hazmat/backends/interfaces.rst b/docs/hazmat/backends/interfaces.rst
index 73011dd..83ec6f1 100644
--- a/docs/hazmat/backends/interfaces.rst
+++ b/docs/hazmat/backends/interfaces.rst
@@ -133,13 +133,15 @@
:returns: ``True`` if the specified ``algorithm`` is supported for HMAC
by this backend, otherwise ``False``.
- .. method:: create_hmac_ctx(algorithm)
+ .. method:: create_hmac_ctx(key, algorithm)
Create a
:class:`~cryptography.hazmat.primitives.hashes.HashContext` that
uses the specified ``algorithm`` to calculate a hash-based message
authentication code.
+ :param bytes key: Secret key as ``bytes``.
+
:param algorithm: An instance of a
:class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm`
provider.