diff --git a/Doc/c-api/object.rst b/Doc/c-api/object.rst
index 2905fbbd0f7..b9c137ea352 100644
--- a/Doc/c-api/object.rst
+++ b/Doc/c-api/object.rst
@@ -128,7 +128,7 @@ Object Protocol
    .. versionadded:: 3.3
 
 
-.. c:function:: int PyObject_GenericSetDict(PyObject *o, void *context)
+.. c:function:: int PyObject_GenericSetDict(PyObject *o, PyObject *value, void *context)
 
    A generic implementation for the setter of a ``__dict__`` descriptor. This
    implementation does not allow the dictionary to be deleted.
diff --git a/Doc/data/refcounts.dat b/Doc/data/refcounts.dat
index b55e972d536..4dacbe201d2 100644
--- a/Doc/data/refcounts.dat
+++ b/Doc/data/refcounts.dat
@@ -1673,7 +1673,8 @@ PyObject_GenericSetAttr:PyObject*:name:0:
 PyObject_GenericSetAttr:PyObject*:value:+1:
 
 PyObject_GenericSetDict:int:::
-PyObject_GenericSetDict:PyObject*:o:+1:
+PyObject_GenericSetDict:PyObject*:o:0:
+PyObject_GenericSetDict:PyObject*:value:+1:
 PyObject_GenericSetDict:void*:context::
 
 PyObject_GetAttr:PyObject*::+1: