diff --git a/include/fmt/std.h b/include/fmt/std.h
index 4d7b9da4b66c8..2eb7f64feb19c 100644
--- a/include/fmt/std.h
+++ b/include/fmt/std.h
@@ -417,7 +417,7 @@ struct formatter<BitRef, Char,
   template <typename FormatContext>
   FMT_CONSTEXPR auto format(const BitRef& v, FormatContext& ctx) const
       -> decltype(ctx.out()) {
-    return formatter<bool, Char>::format(static_cast<bool>(v), ctx);
+    return formatter<bool, Char>::format(v, ctx);
   }
 };
 
@@ -431,7 +431,7 @@ struct formatter<std::__bit_const_reference<C>, Char> : formatter<bool, Char> {
   template <typename FormatContext>
   FMT_CONSTEXPR20 auto format(const std::__bit_const_reference<C>& v,
                               FormatContext& ctx) const -> decltype(ctx.out()) {
-    return formatter<bool, Char>::format(static_cast<bool>(v), ctx);
+    return formatter<bool, Char>::format(v, ctx);
   }
 };