diff --git a/include/pybind11/detail/common.h b/include/pybind11/detail/common.h
index c281a50f0..6c594ab70 100644
--- a/include/pybind11/detail/common.h
+++ b/include/pybind11/detail/common.h
@@ -487,6 +487,9 @@ enum class return_value_policy : uint8_t {
     _clif_automatic
 };
 
+#define PYBIND11_HAS_RETURN_VALUE_POLICY_RETURN_AS_BYTES
+#define PYBIND11_HAS_RETURN_VALUE_POLICY_CLIF_AUTOMATIC
+
 PYBIND11_NAMESPACE_BEGIN(detail)
 
 inline static constexpr int log2(size_t n, int k = 0) {