diff --git a/Doc/c-api/buffer.rst b/Doc/c-api/buffer.rst
index a04062fb2a68f1..91d1edd9b2ec46 100644
--- a/Doc/c-api/buffer.rst
+++ b/Doc/c-api/buffer.rst
@@ -499,7 +499,7 @@ Buffer-related functions
    This function fails if *len* != *src->len*.
 
 
-.. c:function:: int PyObject_CopyData(Py_buffer *dest, Py_buffer *src)
+.. c:function:: int PyObject_CopyData(PyObject *dest, PyObject *src)
 
    Copy data from *src* to *dest* buffer. Can convert between C-style and
    or Fortran-style buffers.