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-rw-r--r--docs/hazmat/backends/interfaces.rst11
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diff --git a/docs/hazmat/backends/interfaces.rst b/docs/hazmat/backends/interfaces.rst
index b524943d..5b6cd64d 100644
--- a/docs/hazmat/backends/interfaces.rst
+++ b/docs/hazmat/backends/interfaces.rst
@@ -126,6 +126,17 @@ A specific ``backend`` may provide one or more of these interfaces.
A backend with methods for using cryptographic hash functions as message
authentication codes.
+ .. method:: hmac_supported(algorithm)
+
+ Check if the specified ``algorithm`` is supported by this backend.
+
+ :param algorithm: An instance of a
+ :class:`~cryptography.hazmat.primitives.interfaces.HashAlgorithm`
+ provider.
+
+ :returns: ``True`` if the specified ``algorithm`` is supported for HMAC
+ by this backend, otherwise ``False``.
+
.. method:: create_hmac_ctx(algorithm)
Create a