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-rw-r--r--doc/source/reference/c-api/ufunc.rst12
1 files changed, 8 insertions, 4 deletions
diff --git a/doc/source/reference/c-api/ufunc.rst b/doc/source/reference/c-api/ufunc.rst
index 95dc47839..c43743391 100644
--- a/doc/source/reference/c-api/ufunc.rst
+++ b/doc/source/reference/c-api/ufunc.rst
@@ -107,7 +107,10 @@ Types
Arbitrary data (extra arguments, function names, *etc.* )
that can be stored with the ufunc and will be passed in
- when it is called.
+ when it is called. May be ``NULL``.
+
+ .. versionchanged:: 1.23.0
+ Accepts ``NULL`` `data` in addition to array of ``NULL`` values.
This is an example of a func specialized for addition of doubles
returning doubles.
@@ -158,9 +161,10 @@ Functions
:c:type:`PyUFuncGenericFunction` items.
:param data:
- Should be ``NULL`` or a pointer to an array of size *ntypes*
- . This array may contain arbitrary extra-data to be passed to
- the corresponding loop function in the func array.
+ Should be ``NULL`` or a pointer to an array of size *ntypes*.
+ This array may contain arbitrary extra-data to be passed to
+ the corresponding loop function in the func array, including
+ ``NULL``.
:param types:
Length ``(nin + nout) * ntypes`` array of ``char`` encoding the