From ede3b0735748565440e8395e965f33f96a8717bf Mon Sep 17 00:00:00 2001
From: Guillaume Horel <guillaume.horel@gmail.com>
Date: Thu, 26 Jan 2023 13:56:02 -0500
Subject: allow to subclass deepcopy

---
 pyisda/credit_index.pyx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyisda/credit_index.pyx b/pyisda/credit_index.pyx
index 4bed815..0ce2161 100644
--- a/pyisda/credit_index.pyx
+++ b/pyisda/credit_index.pyx
@@ -276,7 +276,7 @@ cdef class CreditIndex(CurveList):
 
     def __deepcopy__(self, memo):
         cdef:
-            CreditIndex copy = CreditIndex.__new__(CreditIndex)
+            CreditIndex copy = type(self).__new__(type(self))
             size_t i
             int n
             TContingentLeg* cl
-- 
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