From cd32cadc0847105f16354b562b9eb1717bba0030 Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian@gmail.com>
Date: Wed, 1 Jan 2020 11:50:01 -0500
Subject: [PATCH] Fix version guard

---
 test/constexpr_tests.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/constexpr_tests.hpp b/test/constexpr_tests.hpp
index b1b3d32..ae55cfb 100644
--- a/test/constexpr_tests.hpp
+++ b/test/constexpr_tests.hpp
@@ -2,7 +2,7 @@
 #include <boost/static_string/static_string.hpp>
 
 // char_traits aren't constexpr until c++17
-#ifndef BOOST_STATIC_STRING_CPP17_CONSTEXPR_USED
+#ifdef BOOST_STATIC_STRING_CPP14_CONSTEXPR_USED
 struct cxper_char_traits
 {
   using char_type = char;