diff --git a/include/fmt/format.h b/include/fmt/format.h
index cae24f144064..1d4d3cb8cf27 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -2260,7 +2260,7 @@ FMT_CONSTEXPR20 auto write(OutputIt out, T value,
     precision = 1;
   }
   if (const_check(std::is_same<T, float>())) fspecs.binary32 = true;
-  if (!std::numeric_limits<T>::is_iec559 || std::numeric_limits<T>::digits > 64)
+  if (const_check(!std::numeric_limits<T>::is_iec559 || std::numeric_limits<T>::digits > 64))
     fspecs.fallback = true;
   int exp = format_float(convert_float(value), precision, fspecs, buffer);
   fspecs.precision = precision;