diff --git a/Doc/c-api/sequence.rst b/Doc/c-api/sequence.rst
--- a/Doc/c-api/sequence.rst
+++ b/Doc/c-api/sequence.rst
@@ -167,7 +167,7 @@ Sequence Protocol
 
 .. c:function:: PyObject* PySequence_Fast(PyObject *o, const char *m)
 
-   Returns the sequence *o* as a tuple, unless it is already a tuple or list, in
+   Returns the sequence *o* as a list, unless it is already a tuple or list, in
    which case *o* is returned.  Use :c:func:`PySequence_Fast_GET_ITEM` to access the
    members of the result.  Returns *NULL* on failure.  If the object is not a
    sequence, raises :exc:`TypeError` with *m* as the message text.
diff --git a/Include/abstract.h b/Include/abstract.h
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -1149,7 +1149,7 @@ xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
 
      PyAPI_FUNC(PyObject *) PySequence_Fast(PyObject *o, const char* m);
        /*
-     Returns the sequence, o, as a tuple, unless it's already a
+     Returns the sequence, o, as a list, unless it's already a
      tuple or list.  Use PySequence_Fast_GET_ITEM to access the
      members of this list, and PySequence_Fast_GET_SIZE to get its length.