diff --git a/Objects/enumobject.c b/Objects/enumobject.c
index f8e4072..62e55bb 100644
--- a/Objects/enumobject.c
+++ b/Objects/enumobject.c
@@ -238,6 +238,8 @@
 		Py_DECREF(reversed_meth);
 		return res;
 	}
+	else if (PyErr_Occurred())
+		return NULL;
 
 	if (!PySequence_Check(seq)) {
 		PyErr_SetString(PyExc_TypeError,