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-rw-r--r--Include/stringobject.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/Include/stringobject.h b/Include/stringobject.h
index 2d9ed2d91c..a67e33e3a8 100644
--- a/Include/stringobject.h
+++ b/Include/stringobject.h
@@ -51,7 +51,7 @@ typedef struct {
extern DL_IMPORT(PyTypeObject) PyString_Type;
-#define PyString_Check(op) ((op)->ob_type == &PyString_Type)
+#define PyString_Check(op) PyObject_TypeCheck(op, &PyString_Type)
extern DL_IMPORT(PyObject *) PyString_FromStringAndSize(const char *, int);
extern DL_IMPORT(PyObject *) PyString_FromString(const char *);