diff --git a/Python/ceval.c b/Python/ceval.c
index 140112f..684c6c2 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -755,7 +755,7 @@
 
 
 PyObject *
-PyEval_EvalCode(PyCodeObject *co, PyObject *globals, PyObject *locals)
+PyEval_EvalCode(PyObject *co, PyObject *globals, PyObject *locals)
 {
     return PyEval_EvalCodeEx(co,
                       globals, locals,
@@ -3059,10 +3059,11 @@
    the test in the if statements in Misc/gdbinit (pystack and pystackv). */
 
 PyObject *
-PyEval_EvalCodeEx(PyCodeObject *co, PyObject *globals, PyObject *locals,
+PyEval_EvalCodeEx(PyObject *_co, PyObject *globals, PyObject *locals,
            PyObject **args, int argcount, PyObject **kws, int kwcount,
            PyObject **defs, int defcount, PyObject *kwdefs, PyObject *closure)
 {
+    PyCodeObject* co = (PyCodeObject*)_co;
     register PyFrameObject *f;
     register PyObject *retval = NULL;
     register PyObject **fastlocals, **freevars;
@@ -3968,7 +3969,7 @@
         d = &PyTuple_GET_ITEM(argdefs, 0);
         nd = Py_SIZE(argdefs);
     }
-    return PyEval_EvalCodeEx(co, globals,
+    return PyEval_EvalCodeEx((PyObject*)co, globals,
                              (PyObject *)NULL, (*pp_stack)-n, na,
                              (*pp_stack)-2*nk, nk, d, nd, kwdefs,
                              PyFunction_GET_CLOSURE(func));