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-rw-r--r--doc/source/reference/c-api.array.rst5
1 files changed, 4 insertions, 1 deletions
diff --git a/doc/source/reference/c-api.array.rst b/doc/source/reference/c-api.array.rst
index e3723c46f..4015e2f35 100644
--- a/doc/source/reference/c-api.array.rst
+++ b/doc/source/reference/c-api.array.rst
@@ -108,10 +108,13 @@ sub-types).
.. cfunction:: int PyArray_FLAGS(PyArrayObject* arr)
-.. cfunction:: int PyArray_ITEMSIZE(PyArrayObject* arr)
+.. cfunction:: npy_intp PyArray_ITEMSIZE(PyArrayObject* arr)
Return the itemsize for the elements of this array.
+ Note that, in the old API that was deprecated in version 1.7, this function
+ had the return type ``int``.
+
.. cfunction:: int PyArray_TYPE(PyArrayObject* arr)
Return the (builtin) typenumber for the elements of this array.