OFB uses an initialization vector instead a nonce.
diff --git a/docs/primitives/symmetric-encryption.rst b/docs/primitives/symmetric-encryption.rst
index be86229..46d7c07 100644
--- a/docs/primitives/symmetric-encryption.rst
+++ b/docs/primitives/symmetric-encryption.rst
@@ -68,16 +68,18 @@
reuse an ``initialization_vector`` with
a given ``key``.
-.. class:: cryptography.primitives.block.modes.OFB(nonce)
+.. class:: cryptography.primitives.block.modes.OFB(initialization_vector)
OFB (Output Feedback) is a mode of operation for block ciphers. It
transforms a block cipher into a stream cipher.
- :param bytes nonce: Must be random bytes. They do not need to be kept
- secret (they can be included in a transmitted message).
- Must be the same number of bytes as the ``block_size``
- of the cipher. Reuse of a ``nonce`` with a given
- ``key`` can allow recovery of the original plaintext.
+ :param bytes initialization_vector: Must be random bytes. They do not need
+ to be kept secret (they can be included
+ in a transmitted message). Must be the
+ same number of bytes as the
+ ``block_size`` of the cipher. Do not
+ reuse an ``initialization_vector`` with
+ a given ``key``.
.. class:: cryptography.primitives.block.modes.CFB(initialization_vector)