diff --git a/Python/Python-ast.c b/Python/Python-ast.c
index d9e13e2..4ca269f 100644
--- a/Python/Python-ast.c
+++ b/Python/Python-ast.c
@@ -636,7 +636,7 @@
 
 static PyObject* ast2obj_list(asdl_seq *seq, PyObject* (*func)(void*))
 {
-    int i, n = asdl_seq_LEN(seq);
+    Py_ssize_t i, n = asdl_seq_LEN(seq);
     PyObject *result = PyList_New(n);
     PyObject *value;
     if (!result)
@@ -2857,7 +2857,7 @@
                         goto failed;
                 Py_DECREF(value);
                 {
-                        int i, n = asdl_seq_LEN(o->v.Compare.ops);
+                        Py_ssize_t i, n = asdl_seq_LEN(o->v.Compare.ops);
                         value = PyList_New(n);
                         if (!value) goto failed;
                         for(i = 0; i < n; i++)