diff --git a/sycl/include/sycl/ext/oneapi/functional.hpp b/sycl/include/sycl/ext/oneapi/functional.hpp
index 18310ddd2f0e..a5c8f7a8f424 100644
--- a/sycl/include/sycl/ext/oneapi/functional.hpp
+++ b/sycl/include/sycl/ext/oneapi/functional.hpp
@@ -16,6 +16,8 @@
 
 namespace sycl {
 inline namespace _V1 {
+
+#ifndef __INTEL_PREVIEW_BREAKING_CHANGES
 namespace ext::oneapi {
 
 template <typename T = void>
@@ -38,9 +40,11 @@ using maximum
 template <typename T = void>
 using minimum
     __SYCL2020_DEPRECATED("Use sycl::minimum<> instead") = sycl::minimum<T>;
-
 } // namespace ext::oneapi
+#endif // __INTEL_PREVIEW_BREAKING_CHANGES
 
+// TODO: The group operation helpers below are not extension-specific; consider
+// moving them to a non-extension header (e.g. sycl/functional.hpp).
 #ifdef __SYCL_DEVICE_ONLY__
 namespace detail {