Fixes docstring typo.
diff --git a/src/cryptography/hazmat/backends/interfaces.py b/src/cryptography/hazmat/backends/interfaces.py
index 512cb6e..4d378e6 100644
--- a/src/cryptography/hazmat/backends/interfaces.py
+++ b/src/cryptography/hazmat/backends/interfaces.py
@@ -277,7 +277,7 @@
     @abc.abstractmethod
     def create_x509_csr(self, builder, private_key, algorithm):
         """
-        Create and sign an X.509 CSR from a CSR buidler object.
+        Create and sign an X.509 CSR from a CSR builder object.
         """