1 files changed, 1 insertions, 2 deletions
diff --git a/Objects/genobject.c b/Objects/genobject.c
index 24a1da6..8c2213e 100644
--- a/Objects/genobject.c
+++ b/Objects/genobject.c
@@ -574,8 +574,7 @@ _PyGen_SetStopIterationValue(PyObject *value)
     PyObject *e;
 
     if (value == NULL ||
-        (!PyTuple_Check(value) &&
-         !PyObject_TypeCheck(value, (PyTypeObject *) PyExc_StopIteration)))
+        (!PyTuple_Check(value) && !PyExceptionInstance_Check(value)))
     {
         /* Delay exception instantiation if we can */
         PyErr_SetObject(PyExc_StopIteration, value);