diff --git a/include/fmt/format.h b/include/fmt/format.h
index efec5d6d..5d6be744 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -2439,7 +2439,7 @@ template <typename Handler, typename Char> struct id_adapter {
 template <bool IS_CONSTEXPR, typename Char, typename Handler>
 FMT_CONSTEXPR void parse_format_string(basic_string_view<Char> format_str,
                                        Handler&& handler) {
-  struct writer {
+  struct pfs_writer {
     FMT_CONSTEXPR void operator()(const Char* begin, const Char* end) {
       if (begin == end) return;
       for (;;) {