diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index bd66a2224eccb..b15ff0d6d20a3 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -706,6 +706,9 @@ Bug Fixes in This Version
   ``await_suspend`` could be misoptimized, including accesses to the awaiter
   object itself.
   (`#56301 <https://github.com/llvm/llvm-project/issues/56301>`_)
+  The current solution may bring performance regressions if the awaiters have
+  non-static data members. See
+  `#64945 <https://github.com/llvm/llvm-project/issues/64945>`_ for details.
 
 Bug Fixes to Compiler Builtins
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^