From 8d7c1763a4c9898b6933a4ad3df6763f87ec56d6 Mon Sep 17 00:00:00 2001
From: Matt Borland <matt@mattborland.com>
Date: Mon, 2 Mar 2026 09:22:27 -0500
Subject: [PATCH] Fix sign conversion when Integer is a signed type

---
 include/boost/charconv/detail/from_chars_integer_impl.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/boost/charconv/detail/from_chars_integer_impl.hpp b/include/boost/charconv/detail/from_chars_integer_impl.hpp
index 69d5e5f9..94d53af6 100644
--- a/include/boost/charconv/detail/from_chars_integer_impl.hpp
+++ b/include/boost/charconv/detail/from_chars_integer_impl.hpp
@@ -155,8 +155,8 @@ BOOST_CXX14_CONSTEXPR from_chars_result from_chars_integer_impl(const char* firs
         else
         #endif
         {
-            overflow_value = (std::numeric_limits<Integer>::max)();
-            max_digit = (std::numeric_limits<Integer>::max)();
+            overflow_value = static_cast<Unsigned_Integer>((std::numeric_limits<Integer>::max)());
+            max_digit = static_cast<Unsigned_Integer>((std::numeric_limits<Integer>::max)());
         }
 
         if (is_negative)