diff --git a/clang/docs/UndefinedBehaviorSanitizer.rst b/clang/docs/UndefinedBehaviorSanitizer.rst
--- a/clang/docs/UndefinedBehaviorSanitizer.rst
+++ b/clang/docs/UndefinedBehaviorSanitizer.rst
@@ -184,8 +184,8 @@
 You can also use the following check groups:
   -  ``-fsanitize=undefined``: All of the checks listed above other than
      ``float-divide-by-zero``, ``unsigned-integer-overflow``,
-     ``implicit-conversion``, ``local-bounds`` and the ``nullability-*`` group
-     of checks.
+     ``implicit-conversion``, ``local-bounds``, ``objc-cast``, and
+     the ``nullability-*`` group of checks.
   -  ``-fsanitize=undefined-trap``: Deprecated alias of
      ``-fsanitize=undefined``.
   -  ``-fsanitize=implicit-integer-truncation``: Catches lossy integral