From 6dcda053a3660b71b8d1c4df9df4a963691a1f4d Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian@gmail.com>
Date: Sun, 2 Feb 2020 23:59:51 -0500
Subject: [PATCH] Fix guards

---
 test/constexpr_tests.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/constexpr_tests.hpp b/test/constexpr_tests.hpp
index 39ab8d5..f83126d 100644
--- a/test/constexpr_tests.hpp
+++ b/test/constexpr_tests.hpp
@@ -10,8 +10,8 @@
 #include <string>
 #include <boost/static_string/static_string.hpp>
 
-// char_traits aren't constexpr until c++17
-#ifdef BOOST_STATIC_STRING_STANDARD_VERSION <= 201703L  && BOOST_STATIC_STRING_STANDARD_VERSION >= 201402L
+// char_traits aren't fully constexpr until c++20
+#if BOOST_STATIC_STRING_STANDARD_VERSION <= 201703L && BOOST_STATIC_STRING_STANDARD_VERSION >= 201402L
 struct cxper_char_traits
 {
   using char_type = char;