From ce219d591cda1ae602ba6e6e8c269f466e907e57 Mon Sep 17 00:00:00 2001
From: Pete R Jemian <prjemian@gmail.com>
Date: Tue, 19 Dec 2023 01:10:36 -0600
Subject: [PATCH] MNT #316 can JSON serialize a tuple

---
 hkl/diffract.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hkl/diffract.py b/hkl/diffract.py
index 67bcb312..3911e549 100644
--- a/hkl/diffract.py
+++ b/hkl/diffract.py
@@ -168,7 +168,7 @@ class (using `calc_kw`) to instantiate a new one.
     lattice_reciprocal = Cpt(
         # fmt: off
         AttributeSignal,
-        attr="calc.sample.reciprocal",
+        attr="calc._cfg_reciprocal",
         doc="Reciprocal lattice",
         # fmt: on
     )