diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index deffa24c4e429..d6bc7d18f13d1 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -61,7 +61,7 @@ Improvements to Clang's diagnostics
 New Compiler Flags
 ------------------
 
-The option ....
+- --autocomplete was implemented to obtain a list of flags and its arguments. This is used for shell autocompletion.
 
 Deprecated Compiler Flags
 -------------------------