diff --git a/include/fmt/core.h b/include/fmt/core.h
index 14ac2070..696b8676 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -2487,7 +2487,7 @@ FMT_CONSTEXPR FMT_INLINE auto parse_format_specs(const Char* begin,
                                                  const Char* end,
                                                  SpecHandler&& handler)
     -> const Char* {
-  if (begin + 1 < end && begin[1] == '}' && is_ascii_letter(*begin) &&
+  if (1 < end - begin && begin[1] == '}' && is_ascii_letter(*begin) &&
       *begin != 'L') {
     presentation_type type = parse_presentation_type(*begin++);
     if (type == presentation_type::none)