diff --git a/include/boost/describe/detail/config.hpp b/include/boost/describe/detail/config.hpp
index fdc75ea..b2aa615 100644
--- a/include/boost/describe/detail/config.hpp
+++ b/include/boost/describe/detail/config.hpp
@@ -45,6 +45,17 @@
 
 #define BOOST_DESCRIBE_INLINE_CONSTEXPR BOOST_DESCRIBE_INLINE_VARIABLE BOOST_DESCRIBE_CONSTEXPR_OR_CONST
 
+#if __cplusplus >= 201703L || ( defined(_MSVC_LANG) && _MSVC_LANG >= 201703L )
+
+# define BOOST_DESCRIBE_CXX17_CONSTEXPR constexpr
+# define BOOST_DESCRIBE_HAS_CXX17_CONSTEXPR
+
+#else
+
+# define BOOST_DESCRIBE_CXX17_CONSTEXPR
+
+#endif
+
 #if __cplusplus >= 202002L || ( defined(_MSVC_LANG) && _MSVC_LANG >= 202002L )
 
 # define BOOST_DESCRIBE_CXX20
diff --git a/include/boost/describe/enum_to_string.hpp b/include/boost/describe/enum_to_string.hpp
index b06e3ac..a828bdb 100644
--- a/include/boost/describe/enum_to_string.hpp
+++ b/include/boost/describe/enum_to_string.hpp
@@ -23,7 +23,7 @@ namespace describe
 {
 
 template<class E, class De = describe_enumerators<E>>
-char const * enum_to_string( E e, char const* def ) noexcept
+BOOST_DESCRIBE_CXX17_CONSTEXPR char const * enum_to_string( E e, char const* def ) noexcept
 {
     char const * r = def;
 
diff --git a/test/enum_to_string_test.cpp b/test/enum_to_string_test.cpp
index 0ac2576..1dbddc9 100644
--- a/test/enum_to_string_test.cpp
+++ b/test/enum_to_string_test.cpp
@@ -35,6 +35,10 @@ int main()
     BOOST_TEST_CSTR_EQ( enum_to_string( E4::v4, "" ), "v4" );
     BOOST_TEST_EQ( enum_to_string( static_cast<E4>( 14 ), 0 ), static_cast<char const*>( 0 ) );
 
+#if defined(BOOST_DESCRIBE_HAS_CXX17_CONSTEXPR)
+    static_assert(enum_to_string(E2::v2, "")[1] == '2');
+    static_assert(enum_to_string(static_cast<E2>(10), "")[0] == 0);
+#endif
     return boost::report_errors();
 }