diff --git a/pep-0649.rst b/pep-0649.rst
index 79fa999f4e5..3074678c95d 100644
--- a/pep-0649.rst
+++ b/pep-0649.rst
@@ -72,7 +72,8 @@ The functionality is accessed via a new keyword-only parameter,
 ``format``.  ``format`` allows the user to request
 the annotations from these functions
 in a specific format.
-Format identifiers are always predefined integer values.
+Format identifiers are defined in the :mod:`inspect` module
+in a new ``AnnotationFormat`` enum, which is an ``enum.IntEnum``.
 The formats defined by this PEP are:
 
 * ``inspect.VALUE = 1``
@@ -573,11 +574,11 @@ Language Reference:
     annotations values should be provided.  Must be one of the
     following:
 
-    ``1`` (exported as ``inspect.VALUE``)
+    ``1`` (exported as ``inspect.AnnotationFormat.VALUE``)
 
         Values are the result of evaluating the annotation expressions.
 
-    ``2`` (exported as ``inspect.SOURCE``)
+    ``2`` (exported as ``inspect.AnnotationFormat.SOURCE``)
 
         Values are the text string of the annotation as it
         appears in the source code.  May only be approximate;
@@ -585,7 +586,7 @@ Language Reference:
         be optimized.  It's possible the exact values of these
         strings could change in future version of Python.
 
-    ``3`` (exported as ``inspect.FORWARDREF``)
+    ``3`` (exported as ``inspect.AnnotationFormat.FORWARDREF``)
 
         Values are real annotation values (as per ``inspect.VALUE`` format)
         for defined values, and ``ForwardRef`` proxies for undefined values.
@@ -716,9 +717,12 @@ annotations dict should be returned in.
 ``format`` accepts the following values, defined as attributes on the
 ``inspect`` module::
 
+```
+class AnnotationFormat(enum.IntEnum):
     VALUE = 1
     FORWARDREF = 2
     SOURCE = 3
+```
 
 The default value for the ``format`` parameter is ``1``,
 which is ``VALUE`` format.
@@ -727,8 +731,8 @@ The defined ``format`` values are guaranteed to be contiguous,
 and the ``inspect`` module also publishes attributes representing
 the minimum and maximum supported ``format`` values::
 
-    FORMAT_MIN = VALUE
-    FORMAT_MAX = SOURCE
+    FORMAT_MIN = AnnotationFormat.VALUE
+    FORMAT_MAX = AnnotationFormat.SOURCE
 
 
 Also, when either ``__annotations__`` or ``__annotate__`` is updated on an