diff --git a/docs/ReleaseNotes.html b/docs/ReleaseNotes.html
index 2c673bdc6db..849b87912d1 100644
--- a/docs/ReleaseNotes.html
+++ b/docs/ReleaseNotes.html
@@ -134,6 +134,9 @@ object tree as subdirectories are built. This means that:
The configure script will now configure all projects placed in the
llvm/projects directory.
+The -tailcallelim pass can now introduce "accumulator" variables
+ to transform functions in many common cases that it could not before.
+
The -licm pass can now sink instructions out the bottom of loops
in addition to being able to hoist them out the top.