diff --git a/libcxx/docs/ReleaseNotes.rst b/libcxx/docs/ReleaseNotes.rst
index 2042b35fb73bd7..8dc8733dd048d0 100644
--- a/libcxx/docs/ReleaseNotes.rst
+++ b/libcxx/docs/ReleaseNotes.rst
@@ -184,3 +184,8 @@ Build System Changes
 - The ``LIBCXX_ENABLE_DEBUG_MODE_SUPPORT`` CMake configuration is not supported anymore. If you
   were disabling support for the debug mode with that flag, please use ``LIBCXX_ENABLE_BACKWARDS_COMPATIBILITY_DEBUG_MODE_SYMBOLS=OFF``
   instead.
+
+- MinGW DLL builds of libc++ no longer use dllimport in their headers, which
+  means that the same set of installed headers works for both DLL and static
+  linkage. This means that distributors finally can build both library
+  versions with a single CMake invocation.