From ee0ceac55d8e5801a745b2d3a00e92da82f0f308 Mon Sep 17 00:00:00 2001
From: Kirill Lokotkov <klokotkov@ya.ru>
Date: Wed, 25 Jan 2023 18:44:28 +0300
Subject: [PATCH] C++11 compatibility

---
 include/nlohmann/detail/output/serializer.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/nlohmann/detail/output/serializer.hpp b/include/nlohmann/detail/output/serializer.hpp
index c3e8d291d..f18339fe7 100644
--- a/include/nlohmann/detail/output/serializer.hpp
+++ b/include/nlohmann/detail/output/serializer.hpp
@@ -833,7 +833,7 @@ class serializer
         // the actual conversion
         // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg,hicpp-vararg)
         std::ptrdiff_t len;
-        if constexpr (std::is_same_v<number_float_t, long double>) {
+        if (std::is_same<number_float_t, long double>::value) {
             len = (std::snprintf)(number_buffer.data(), number_buffer.size(), "%.*Lg", d, x);
         } else {
             len = (std::snprintf)(number_buffer.data(), number_buffer.size(), "%.*g", d, x);