diff --git a/libcxx/docs/ReleaseNotes.rst b/libcxx/docs/ReleaseNotes.rst
--- a/libcxx/docs/ReleaseNotes.rst
+++ b/libcxx/docs/ReleaseNotes.rst
@@ -164,3 +164,8 @@
   configuration and isn't supported by one of the configurations in ``libcxx/test/configs``,
   ``libcxxabi/test/configs`` or ``libunwind/test/configs``, please move to one of those
   configurations or define your own.
+
+- MinGW DLL builds of libc++ no longer use dllimport in its 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 one
+  single CMake invocation.