diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -184,6 +184,7 @@
 Floating Point Support in Clang
 -------------------------------
 - Add ``__builtin_elementwise_log``builtin for floating point types only.
+- Add ``__builtin_elementwise_log10`` builtin for floating point types only.
 
 Internal API Changes
 --------------------