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-rw-r--r--doc/source/reference/c-api/types-and-structures.rst4
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/source/reference/c-api/types-and-structures.rst b/doc/source/reference/c-api/types-and-structures.rst
index c45ebb692..8c1a679dc 100644
--- a/doc/source/reference/c-api/types-and-structures.rst
+++ b/doc/source/reference/c-api/types-and-structures.rst
@@ -814,7 +814,9 @@ PyUFunc_Type and PyUFuncObject
.. c:member:: int identity
Either :c:data:`PyUFunc_One`, :c:data:`PyUFunc_Zero`,
- or :c:data:`PyUFunc_None` to indicate
+ :c:data:`PyUFunc_MinusOne`, :c:data:`PyUFunc_None`,
+ :c:data:`PyUFunc_ReorderableNone`, or
+ :c:data:`PyUFunc_IdentityValue` to indicate
the identity for this operation. It is only used for a
reduce-like call on an empty array.