diff --git a/Doc/c-api/object.rst b/Doc/c-api/object.rst
index 2ac975ff7d1..1ae3c46bea4 100644
--- a/Doc/c-api/object.rst
+++ b/Doc/c-api/object.rst
@@ -85,7 +85,7 @@ Object Protocol
    instead of the :func:`repr`.
 
 
-.. c:function:: int PyObject_HasAttrWithError(PyObject *o, const char *attr_name)
+.. c:function:: int PyObject_HasAttrWithError(PyObject *o, PyObject *attr_name)
 
    Returns ``1`` if *o* has the attribute *attr_name*, and ``0`` otherwise.
    This is equivalent to the Python expression ``hasattr(o, attr_name)``.