diff --git a/Python/Python-ast.c b/Python/Python-ast.c
index 5923962..6632001 100644
--- a/Python/Python-ast.c
+++ b/Python/Python-ast.c
@@ -772,12 +772,13 @@
 
 static int exists_not_none(PyObject *obj, _Py_Identifier *id)
 {
+    int isnone;
     PyObject *attr = _PyObject_GetAttrId(obj, id);
     if (!attr) {
         PyErr_Clear();
         return 0;
     }
-    int isnone = attr == Py_None;
+    isnone = attr == Py_None;
     Py_DECREF(attr);
     return !isnone;
 }