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-rw-r--r--Doc/c-api/bytearray.rst3
1 files changed, 2 insertions, 1 deletions
diff --git a/Doc/c-api/bytearray.rst b/Doc/c-api/bytearray.rst
index 8202205..41b6e3c 100644
--- a/Doc/c-api/bytearray.rst
+++ b/Doc/c-api/bytearray.rst
@@ -64,7 +64,8 @@ Direct API functions
.. c:function:: char* PyByteArray_AsString(PyObject *bytearray)
Return the contents of *bytearray* as a char array after checking for a
- *NULL* pointer.
+ *NULL* pointer. The returned array always has an extra
+ null byte appended.
.. c:function:: int PyByteArray_Resize(PyObject *bytearray, Py_ssize_t len)