diff --git a/libcxx/include/optional b/libcxx/include/optional
--- a/libcxx/include/optional
+++ b/libcxx/include/optional
@@ -393,7 +393,7 @@
     }
 };
 
-// optional<T&> is currently required ill-formed, however it may to be in the
+// optional<T&> is currently required to be ill-formed, however it may be in the
 // future. For this reason it has already been implemented to ensure we can
 // make the change in an ABI compatible manner.
 template <class _Tp>