diff --git a/docs/x509/reference.rst b/docs/x509/reference.rst
index 8d8bda4..3d99364 100644
--- a/docs/x509/reference.rst
+++ b/docs/x509/reference.rst
@@ -2263,6 +2263,22 @@
         the ``CRLNumber`` extension type. This extension only has meaning
         for certificate revocation lists.
 
+.. class:: CRLEntryExtensionOID
+
+    .. versionadded:: 1.2
+
+    .. attribute:: CERTIFICATE_ISSUER
+
+        Corresponds to the dotted string ``"2.5.29.29"``.
+
+    .. attribute:: CRL_REASON
+
+        Corresponds to the dotted string ``"2.5.29.21"``.
+
+    .. attribute:: INVALIDITY_DATE
+
+        Corresponds to the dotted string ``"2.5.29.24"``.
+
 Exceptions
 ~~~~~~~~~~
 .. currentmodule:: cryptography.x509
diff --git a/src/cryptography/hazmat/backends/openssl/x509.py b/src/cryptography/hazmat/backends/openssl/x509.py
index a470adb..f3286b0 100644
--- a/src/cryptography/hazmat/backends/openssl/x509.py
+++ b/src/cryptography/hazmat/backends/openssl/x509.py
@@ -20,7 +20,7 @@
 from cryptography.exceptions import UnsupportedAlgorithm
 from cryptography.hazmat.primitives import hashes, serialization
 from cryptography.x509.oid import (
-    CRLExtensionOID, CertificatePoliciesOID, ExtensionOID
+    CRLEntryExtensionOID, CertificatePoliciesOID, ExtensionOID
 )
 
 
@@ -740,7 +740,7 @@
         backend._consume_errors()
         raise ValueError(
             "The {0} extension is corrupted and can't be parsed".format(
-                CRLExtensionOID.CERTIFICATE_ISSUER))
+                CRLEntryExtensionOID.CERTIFICATE_ISSUER))
 
     gns = backend._ffi.gc(gns, backend._lib.GENERAL_NAMES_free)
     return x509.GeneralNames(_decode_general_names(backend, gns))
@@ -992,13 +992,13 @@
 }
 
 _REVOKED_EXTENSION_HANDLERS = {
-    CRLExtensionOID.CRL_REASON: _decode_crl_reason,
-    CRLExtensionOID.INVALIDITY_DATE: _decode_invalidity_date,
-    CRLExtensionOID.CERTIFICATE_ISSUER: _decode_cert_issuer,
+    CRLEntryExtensionOID.CRL_REASON: _decode_crl_reason,
+    CRLEntryExtensionOID.INVALIDITY_DATE: _decode_invalidity_date,
+    CRLEntryExtensionOID.CERTIFICATE_ISSUER: _decode_cert_issuer,
 }
 
 _REVOKED_UNSUPPORTED_EXTENSIONS = set([
-    CRLExtensionOID.CERTIFICATE_ISSUER,
+    CRLEntryExtensionOID.CERTIFICATE_ISSUER,
 ])
 
 _CRL_EXTENSION_HANDLERS = {
diff --git a/src/cryptography/utils.py b/src/cryptography/utils.py
index 4449e85..b85d50d 100644
--- a/src/cryptography/utils.py
+++ b/src/cryptography/utils.py
@@ -12,7 +12,10 @@
 import warnings
 
 
+# the functions deprecated in 1.0 are on an arbitrarily extended deprecation
+# cycle and should not be removed until we agree on when that cycle ends.
 DeprecatedIn10 = DeprecationWarning
+DeprecatedIn12 = PendingDeprecationWarning
 
 
 def read_only_property(name):
diff --git a/src/cryptography/x509/__init__.py b/src/cryptography/x509/__init__.py
index 5653144..8698c08 100644
--- a/src/cryptography/x509/__init__.py
+++ b/src/cryptography/x509/__init__.py
@@ -29,9 +29,9 @@
 )
 from cryptography.x509.name import Name, NameAttribute
 from cryptography.x509.oid import (
-    AuthorityInformationAccessOID, CRLExtensionOID, CertificatePoliciesOID,
-    ExtendedKeyUsageOID, ExtensionOID, NameOID, ObjectIdentifier,
-    SignatureAlgorithmOID, _SIG_OIDS_TO_HASH
+    AuthorityInformationAccessOID, CRLEntryExtensionOID,
+    CertificatePoliciesOID, ExtendedKeyUsageOID, ExtensionOID, NameOID,
+    ObjectIdentifier, SignatureAlgorithmOID, _SIG_OIDS_TO_HASH
 )
 
 
@@ -96,9 +96,9 @@
 OID_CPS_QUALIFIER = CertificatePoliciesOID.CPS_QUALIFIER
 OID_CPS_USER_NOTICE = CertificatePoliciesOID.CPS_USER_NOTICE
 
-OID_CERTIFICATE_ISSUER = CRLExtensionOID.CERTIFICATE_ISSUER
-OID_CRL_REASON = CRLExtensionOID.CRL_REASON
-OID_INVALIDITY_DATE = CRLExtensionOID.INVALIDITY_DATE
+OID_CERTIFICATE_ISSUER = CRLEntryExtensionOID.CERTIFICATE_ISSUER
+OID_CRL_REASON = CRLEntryExtensionOID.CRL_REASON
+OID_INVALIDITY_DATE = CRLEntryExtensionOID.INVALIDITY_DATE
 
 OID_CA_ISSUERS = AuthorityInformationAccessOID.CA_ISSUERS
 OID_OCSP = AuthorityInformationAccessOID.OCSP
diff --git a/src/cryptography/x509/oid.py b/src/cryptography/x509/oid.py
index 94295d6..ced1510 100644
--- a/src/cryptography/x509/oid.py
+++ b/src/cryptography/x509/oid.py
@@ -88,12 +88,20 @@
     CRL_NUMBER = ObjectIdentifier("2.5.29.20")
 
 
-class CRLExtensionOID(object):
+class CRLEntryExtensionOID(object):
     CERTIFICATE_ISSUER = ObjectIdentifier("2.5.29.29")
     CRL_REASON = ObjectIdentifier("2.5.29.21")
     INVALIDITY_DATE = ObjectIdentifier("2.5.29.24")
 
 
+CRLExtensionOID = utils.deprecated(
+    CRLEntryExtensionOID,
+    __name__,
+    "CRLExtensionOID has been renamed to CRLEntryExtensionOID",
+    utils.DeprecatedIn12
+)
+
+
 class NameOID(object):
     COMMON_NAME = ObjectIdentifier("2.5.4.3")
     COUNTRY_NAME = ObjectIdentifier("2.5.4.6")
@@ -220,9 +228,9 @@
     ExtensionOID.SUBJECT_ALTERNATIVE_NAME: "subjectAltName",
     ExtensionOID.ISSUER_ALTERNATIVE_NAME: "issuerAltName",
     ExtensionOID.BASIC_CONSTRAINTS: "basicConstraints",
-    CRLExtensionOID.CRL_REASON: "cRLReason",
-    CRLExtensionOID.INVALIDITY_DATE: "invalidityDate",
-    CRLExtensionOID.CERTIFICATE_ISSUER: "certificateIssuer",
+    CRLEntryExtensionOID.CRL_REASON: "cRLReason",
+    CRLEntryExtensionOID.INVALIDITY_DATE: "invalidityDate",
+    CRLEntryExtensionOID.CERTIFICATE_ISSUER: "certificateIssuer",
     ExtensionOID.NAME_CONSTRAINTS: "nameConstraints",
     ExtensionOID.CRL_DISTRIBUTION_POINTS: "cRLDistributionPoints",
     ExtensionOID.CERTIFICATE_POLICIES: "certificatePolicies",