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-rw-r--r--Include/floatobject.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/Include/floatobject.h b/Include/floatobject.h
index 3b6ca47..51be745 100644
--- a/Include/floatobject.h
+++ b/Include/floatobject.h
@@ -14,6 +14,8 @@ extern "C" {
PyAPI_DATA(PyTypeObject) PyFloat_Type;
#define PyFloat_Check(op) PyObject_TypeCheck(op, &PyFloat_Type)
+#define PyFloat_Check(op) \
+ PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_FLOAT_SUBCLASS)
#define PyFloat_CheckExact(op) Py_IS_TYPE(op, &PyFloat_Type)
#ifdef Py_NAN