diff --git a/include/fmt/format.h b/include/fmt/format.h
index 76e4fac6..ef4c2c32 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -2348,7 +2348,12 @@ template <typename SpecHandler, typename Char> struct precision_adapter {
 
 template <typename Char>
 FMT_CONSTEXPR const Char* next_code_point(const Char* begin, const Char* end) {
+
+#ifdef __cpp_if_constexpr
+  if (constexpr (sizeof(Char) != 1) || (*begin & 0x80) == 0) return begin + 1;
+#else
   if (sizeof(Char) != 1 || (*begin & 0x80) == 0) return begin + 1;
+#endif
   do {
     ++begin;
   } while (begin != end && (*begin & 0xc0) == 0x80);