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-rw-r--r--cryptography/hazmat/primitives/interfaces.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/cryptography/hazmat/primitives/interfaces.py b/cryptography/hazmat/primitives/interfaces.py
index dacabb2e..295f5282 100644
--- a/cryptography/hazmat/primitives/interfaces.py
+++ b/cryptography/hazmat/primitives/interfaces.py
@@ -393,7 +393,7 @@ class KeyDerivationFunction(object):
@six.add_metaclass(abc.ABCMeta)
class CMACContext(object):
@abc.abstractmethod
- def update(self):
+ def update(self, data):
"""
Processes the provided bytes.
"""