--- /dev/null
+From 44c3fe1ebb466ab5c296e1a1a6991c7c7b51b72e Mon Sep 17 00:00:00 2001
+From: Victor Zverovich <viz@meta.com>
+Date: Fri, 9 Feb 2024 15:58:56 -0800
+Subject: [PATCH] Fix handling of static separator
+
+---
+ include/fmt/format-inl.h | 7 +++++--
+ 1 file changed, 5 insertions(+), 2 deletions(-)
+
+--- a/include/fmt/format-inl.h
++++ b/include/fmt/format-inl.h
+@@ -114,7 +114,11 @@ template <typename Char> FMT_FUNC Char d
+
+ FMT_FUNC auto write_loc(appender out, loc_value value,
+ const format_specs<>& specs, locale_ref loc) -> bool {
+-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
++#ifdef FMT_STATIC_THOUSANDS_SEPARATOR
++ value.visit(loc_writer<>{
++ out, specs, std::string(1, FMT_STATIC_THOUSANDS_SEPARATOR), "\3", "."});
++ return true;
++#else
+ auto locale = loc.get<std::locale>();
+ // We cannot use the num_put<char> facet because it may produce output in
+ // a wrong encoding.
+@@ -123,7 +127,6 @@ FMT_FUNC auto write_loc(appender out, lo
+ return std::use_facet<facet>(locale).put(out, value, specs);
+ return facet(locale).put(out, value, specs);
+ #endif
+- return false;
+ }
+ } // namespace detail
+