From 519f0c2ed7bf7bf8667cb4b90151a2d2aa66538b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Iy=C3=A1n=20M=C3=A9ndez=20Veiga?= <me@iyanmv.com>
Date: Wed, 17 Jan 2024 22:24:44 +0100
Subject: [PATCH] Fix build with gcc13

---
 src/stan/io/json/json_handler.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/stan/io/json/json_handler.hpp b/src/stan/io/json/json_handler.hpp
index 85b315ce822..ea6a2f072a3 100644
--- a/src/stan/io/json/json_handler.hpp
+++ b/src/stan/io/json/json_handler.hpp
@@ -1,6 +1,7 @@
 #ifndef STAN_IO_JSON_JSON_HANDLER_HPP
 #define STAN_IO_JSON_JSON_HANDLER_HPP
 
+#include <cstdint>
 #include <string>
 
 namespace stan {