diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -511,6 +511,8 @@
 
 OpenMP Support in Clang
 -----------------------
+* Added the support for ``atomic compare`` and ``atomic compare capture``
+  (``-fopenmp-version=51`` is required).
 
 ...
 
@@ -576,7 +578,7 @@
 
 - Added ``forEachTemplateArgument`` matcher which creates a match every
   time a ``templateArgument`` matches the matcher supplied to it.
-  
+
 - Added ``objcStringLiteral`` matcher which matches ObjectiveC String
   literal expressions.