From 8a5f208b3a7235be43296b302257006548d7e595 Mon Sep 17 00:00:00 2001
From: Thomas Fussell <thomas@fussell.io>
Date: Sat, 13 Aug 2022 15:07:31 -0500
Subject: [PATCH] fix cell_reference hash import

---
 include/xlnt/cell/cell_reference.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/xlnt/cell/cell_reference.hpp b/include/xlnt/cell/cell_reference.hpp
index 66185f37..c8efcb4b 100644
--- a/include/xlnt/cell/cell_reference.hpp
+++ b/include/xlnt/cell/cell_reference.hpp
@@ -25,7 +25,9 @@
 
 #include <xlnt/xlnt_config.hpp>
 #include <xlnt/cell/index_types.hpp>
+
 #include <cstdint>
+#include <functional>
 #include <string>
 #include <tuple>
 #include <utility>