diff --git a/include/boost/parser/detail/text/config.hpp b/include/boost/parser/detail/text/config.hpp
index 2e6f77fb..7df2e4d0 100644
--- a/include/boost/parser/detail/text/config.hpp
+++ b/include/boost/parser/detail/text/config.hpp
@@ -16,17 +16,15 @@
 #endif
 
 
-// The contents of <ranges> in libstdc++ is incomplete (e.g. no owning_view)
-// before GCC 12.
-#if !BOOST_PARSER_USE_CONCEPTS
+#if !BOOST_PARSER_USE_CONCEPTS || defined(_MSC_VER)
 #    define BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS 0
 #else
 #    define BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS 1
 #endif
 
 // GCC 12 claims to support 201907L <= __cpp_deduction_guides, but does not.
-#if defined(__cpp_deduction_guides) && 201907L <= __cpp_deduction_guides &&    \
-    (!defined(__GNUC__) || 13 <= __GNUC__)
+#if BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS && defined(__cpp_deduction_guides) &&    \
+    201907L <= __cpp_deduction_guides && (!defined(__GNUC__) || 13 <= __GNUC__)
 #define BOOST_PARSER_DETAIL_TEXT_USE_ALIAS_CTAD 1
 #else
 #define BOOST_PARSER_DETAIL_TEXT_USE_ALIAS_CTAD 0
diff --git a/include/boost/parser/detail/text/transcode_view.hpp b/include/boost/parser/detail/text/transcode_view.hpp
index 9053efa4..4c333cfa 100644
--- a/include/boost/parser/detail/text/transcode_view.hpp
+++ b/include/boost/parser/detail/text/transcode_view.hpp
@@ -303,7 +303,7 @@ namespace boost::parser::detail { namespace text {
 #else
     template<typename F>
 #endif
-    constexpr detail::project_impl<F> project;
+    constexpr detail::project_impl<F> project{};
 
 #if BOOST_PARSER_DETAIL_TEXT_USE_ALIAS_CTAD
 
diff --git a/include/boost/parser/transcode_view.hpp b/include/boost/parser/transcode_view.hpp
index 3a53b07b..4832beb4 100644
--- a/include/boost/parser/transcode_view.hpp
+++ b/include/boost/parser/transcode_view.hpp
@@ -37,7 +37,7 @@ namespace boost::parser {
 
 #else
 
-#if BOOST_PARSER_USE_CONCEPTS
+#if BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS
     template<detail::text::utf_range V>
         requires std::ranges::view<V>
 #else
@@ -47,7 +47,7 @@ namespace boost::parser {
     {
     public:
         constexpr utf8_view()
-#if BOOST_PARSER_USE_CONCEPTS
+#if BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS
             requires std::default_initializable<V>
 #endif
         = default;
@@ -55,7 +55,7 @@ namespace boost::parser {
             detail::text::utf_view<format::utf8, V>{std::move(base)}
         {}
     };
-#if BOOST_PARSER_USE_CONCEPTS
+#if BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS
     template<detail::text::utf_range V>
         requires std::ranges::view<V>
 #else
@@ -65,7 +65,7 @@ namespace boost::parser {
     {
     public:
         constexpr utf16_view()
-#if BOOST_PARSER_USE_CONCEPTS
+#if BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS
             requires std::default_initializable<V>
 #endif
         = default;
@@ -73,7 +73,7 @@ namespace boost::parser {
             detail::text::utf_view<format::utf16, V>{std::move(base)}
         {}
     };
-#if BOOST_PARSER_USE_CONCEPTS
+#if BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS
     template<detail::text::utf_range V>
         requires std::ranges::view<V>
 #else
@@ -83,7 +83,7 @@ namespace boost::parser {
     {
     public:
         constexpr utf32_view()
-#if BOOST_PARSER_USE_CONCEPTS
+#if BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS
             requires std::default_initializable<V>
 #endif
         = default;
@@ -92,7 +92,7 @@ namespace boost::parser {
         {}
     };
 
-#if BOOST_PARSER_USE_CONCEPTS
+#if BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS
     template<class R>
     utf8_view(R &&) -> utf8_view<std::views::all_t<R>>;
     template<class R>