diff --git a/include/boost/parser/detail/text/transcode_view.hpp b/include/boost/parser/detail/text/transcode_view.hpp
index d12dead6..31f14189 100644
--- a/include/boost/parser/detail/text/transcode_view.hpp
+++ b/include/boost/parser/detail/text/transcode_view.hpp
@@ -800,12 +800,12 @@ namespace boost::parser::detail { namespace text {
 
 }}
 
-#if BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS
-
 namespace std::ranges {
+#if BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS
     template<class V, auto F>
     inline constexpr bool enable_borrowed_range<boost::parser::detail::text::project_view<V, F>> =
         enable_borrowed_range<V>;
+#endif
 
     template<class V>
     inline constexpr bool enable_borrowed_range<boost::parser::detail::text::unpacking_view<V>> =
@@ -829,5 +829,3 @@ namespace std::ranges {
 }
 
 #endif
-
-#endif