From 547f12ae63c53482d2e5f6850ea5a886f14eb6d2 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <viz@fb.com>
Date: Thu, 11 Jun 2020 15:02:42 -0700
Subject: [PATCH] Fix a warning (#1722)

---
 include/fmt/chrono.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/fmt/chrono.h b/include/fmt/chrono.h
index 938f117a..2325c25e 100644
--- a/include/fmt/chrono.h
+++ b/include/fmt/chrono.h
@@ -786,7 +786,7 @@ OutputIt format_duration_unit(OutputIt out) {
   if (const char* unit = get_units<Period>())
     return copy_unit(string_view(unit), out, Char());
   const Char num_f[] = {'[', '{', '}', ']', 's', 0};
-  if (Period::den == 1) return format_to(out, num_f, Period::num);
+  if (const_check(Period::den == 1)) return format_to(out, num_f, Period::num);
   const Char num_def_f[] = {'[', '{', '}', '/', '{', '}', ']', 's', 0};
   return format_to(out, num_def_f, Period::num, Period::den);
 }