diff --git a/libcxx/docs/ReleaseNotes/21.rst b/libcxx/docs/ReleaseNotes/21.rstindex 3d70fa38d971e..96115890e5520 100644--- a/libcxx/docs/ReleaseNotes/21.rst+++ b/libcxx/docs/ReleaseNotes/21.rst@@ -85,7 +85,7 @@ Improvements and New Features - The ``flat_map::insert`` and ``flat_set::insert_range`` have been optimized, resulting in a performance improvement of up   to 10x for inserting elements into a ``flat_map`` when the input range is a ``flat_map`` or a ``zip_view``.-- ``ctype::tolower`` and ``ctype::toupper`` have been optimized, resulting in a 2x performane improvement.+- ``ctype::tolower`` and ``ctype::toupper`` have been optimized, resulting in a 2x performance improvement.  Deprecations and Removals -------------------------