diff --git a/Objects/dictobject.c b/Objects/dictobject.c
index 2f108bd..72cb4c5 100644
--- a/Objects/dictobject.c
+++ b/Objects/dictobject.c
@@ -3095,15 +3095,15 @@
 
 static PyMethodDef mapp_methods[] = {
     DICT___CONTAINS___METHODDEF
-    {"__getitem__", (PyCFunction)dict_subscript,        METH_O | METH_COEXIST,
+    {"__getitem__", (PyCFunction)(void(*)(void))dict_subscript,        METH_O | METH_COEXIST,
      getitem__doc__},
-    {"__sizeof__",      (PyCFunction)dict_sizeof,       METH_NOARGS,
+    {"__sizeof__",      (PyCFunction)(void(*)(void))dict_sizeof,       METH_NOARGS,
      sizeof__doc__},
     DICT_GET_METHODDEF
     DICT_SETDEFAULT_METHODDEF
     {"pop",         (PyCFunction)dict_pop,          METH_VARARGS,
      pop__doc__},
-    {"popitem",         (PyCFunction)dict_popitem,      METH_NOARGS,
+    {"popitem",         (PyCFunction)(void(*)(void))dict_popitem,      METH_NOARGS,
      popitem__doc__},
     {"keys",            dictkeys_new,                   METH_NOARGS,
     keys__doc__},
@@ -3111,7 +3111,7 @@
     items__doc__},
     {"values",          dictvalues_new,                 METH_NOARGS,
     values__doc__},
-    {"update",          (PyCFunction)dict_update,       METH_VARARGS | METH_KEYWORDS,
+    {"update",          (PyCFunction)(void(*)(void))dict_update, METH_VARARGS | METH_KEYWORDS,
      update__doc__},
     DICT_FROMKEYS_METHODDEF
     {"clear",           (PyCFunction)dict_clear,        METH_NOARGS,
@@ -3420,9 +3420,9 @@
 PyDoc_STRVAR(reduce_doc, "Return state information for pickling.");
 
 static PyMethodDef dictiter_methods[] = {
-    {"__length_hint__", (PyCFunction)dictiter_len, METH_NOARGS,
+    {"__length_hint__", (PyCFunction)(void(*)(void))dictiter_len, METH_NOARGS,
      length_hint_doc},
-     {"__reduce__", (PyCFunction)dictiter_reduce, METH_NOARGS,
+     {"__reduce__", (PyCFunction)(void(*)(void))dictiter_reduce, METH_NOARGS,
      reduce_doc},
     {NULL,              NULL}           /* sentinel */
 };
@@ -4209,7 +4209,7 @@
 static PyMethodDef dictkeys_methods[] = {
     {"isdisjoint",      (PyCFunction)dictviews_isdisjoint,  METH_O,
      isdisjoint_doc},
-    {"__reversed__",    (PyCFunction)dictkeys_reversed,    METH_NOARGS,
+    {"__reversed__",    (PyCFunction)(void(*)(void))dictkeys_reversed,    METH_NOARGS,
      reversed_keys_doc},
     {NULL,              NULL}           /* sentinel */
 };
@@ -4315,7 +4315,7 @@
 static PyMethodDef dictitems_methods[] = {
     {"isdisjoint",      (PyCFunction)dictviews_isdisjoint,  METH_O,
      isdisjoint_doc},
-    {"__reversed__",    (PyCFunction)dictitems_reversed,    METH_NOARGS,
+    {"__reversed__",    (PyCFunction)(void(*)(void))dictitems_reversed,    METH_NOARGS,
      reversed_items_doc},
     {NULL,              NULL}           /* sentinel */
 };
@@ -4396,7 +4396,7 @@
 "Return a reverse iterator over the dict values.");
 
 static PyMethodDef dictvalues_methods[] = {
-    {"__reversed__",    (PyCFunction)dictvalues_reversed,    METH_NOARGS,
+    {"__reversed__",    (PyCFunction)(void(*)(void))dictvalues_reversed,    METH_NOARGS,
      reversed_values_doc},
     {NULL,              NULL}           /* sentinel */
 };