1 files changed, 4 insertions, 2 deletions
diff --git a/src/cryptography/x509.py b/src/cryptography/x509.py
index d43b8f04..bcda7217 100644
--- a/src/cryptography/x509.py
+++ b/src/cryptography/x509.py
@@ -1834,12 +1834,14 @@ class CertificateBuilder(object):
             extension = Extension(
                 OID_SUBJECT_KEY_IDENTIFIER, critical, extension
             )
-        elif isinstance(extension, InhibitAnyPolicy):
-            extension = Extension(OID_INHIBIT_ANY_POLICY, critical, extension)
         elif isinstance(extension, CRLDistributionPoints):
             extension = Extension(
                 OID_CRL_DISTRIBUTION_POINTS, critical, extension
             )
+        elif isinstance(extension, IssuerAlternativeName):
+            extension = Extension(
+                OID_ISSUER_ALTERNATIVE_NAME, critical, extension
+            )
         else:
             raise NotImplementedError('Unsupported X.509 extension.')