diff --git a/sycl/include/CL/sycl/handler.hpp b/sycl/include/CL/sycl/handler.hpp
index 39412ceb4179c..cb07824aaee77 100644
--- a/sycl/include/CL/sycl/handler.hpp
+++ b/sycl/include/CL/sycl/handler.hpp
@@ -1396,8 +1396,8 @@ class __SYCL_EXPORT handler {
       this->finalize();
       handler CopyHandler(QueueCopy, MIsHost);
       CopyHandler.saveCodeLoc(MCodeLoc);
-      ONEAPI::detail::reduSaveFinalResultToUserMem<KernelName>(CopyHandler,
-                                                               Redu);
+      ext::oneapi::detail::reduSaveFinalResultToUserMem<KernelName>(CopyHandler,
+                                                                    Redu);
       MLastEvent = CopyHandler.finalize();
     }
   }