diff --git a/Parser/asdl_c.py b/Parser/asdl_c.py
index 496ad01ebb0..94e04b1c021 100755
--- a/Parser/asdl_c.py
+++ b/Parser/asdl_c.py
@@ -938,7 +938,7 @@ class PartingShots(StaticVisitor):
 {
     mod_ty res;
     init_types();
-    if (!PyObject_IsInstance(ast, mod_type)) {
+    if (!PyObject_IsInstance(ast, (PyObject*)mod_type)) {
         PyErr_SetString(PyExc_TypeError, "expected either Module, Interactive "
                         "or Expression node");
         return NULL;
diff --git a/Python/Python-ast.c b/Python/Python-ast.c
index e89c9d57e8c..464d28d34b1 100644
--- a/Python/Python-ast.c
+++ b/Python/Python-ast.c
@@ -6419,7 +6419,7 @@ mod_ty PyAST_obj2mod(PyObject* ast, PyArena* arena)
 {
     mod_ty res;
     init_types();
-    if (!PyObject_IsInstance(ast, mod_type)) {
+    if (!PyObject_IsInstance(ast, (PyObject*)mod_type)) {
         PyErr_SetString(PyExc_TypeError, "expected either Module, Interactive "
                         "or Expression node");
         return NULL;