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-rw-r--r--Mac/Modules/list/_Listmodule.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Mac/Modules/list/_Listmodule.c b/Mac/Modules/list/_Listmodule.c
index 7f36529..5cd007e 100644
--- a/Mac/Modules/list/_Listmodule.c
+++ b/Mac/Modules/list/_Listmodule.c
@@ -71,7 +71,7 @@ static PyObject *List_Error;
PyTypeObject List_Type;
-#define ListObj_Check(x) ((x)->ob_type == &List_Type)
+#define ListObj_Check(x) ((x)->ob_type == &List_Type || PyObject_TypeCheck((x), &List_Type))
typedef struct ListObject {
PyObject_HEAD