diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -351,6 +351,11 @@
   JustMyCode feature. Note, you may need to manually add ``/JMC`` as additional
   compile options in the Visual Studio since it currently assumes clang-cl does not support ``/JMC``.
 
+- Implemented generation of SEH unwind information on ARM. (C++ exception
+  handling in MSVC mode is still unimplemented though.)
+
+- Switched MinGW mode on ARM to use SEH instead of Dwarf for unwind information.
+
 AIX Support
 -----------
 
diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -102,6 +102,8 @@
   versions.
 * Added a pass to workaround Cortex-A57 Erratum 1742098 and Cortex-A72
   Erratum 1655431. This is enabled by default when targeting either CPU.
+* Implemented generation of Windows SEH unwind information.
+* Switched the MinGW target to use SEH instead of Dwarf for unwind information.
 
 Changes to the AVR Backend
 --------------------------