diff --git a/lib/editor/tinymce/upgrade.txt b/lib/editor/tinymce/upgrade.txt
index a8b2c157424..a2551a276d0 100644
--- a/lib/editor/tinymce/upgrade.txt
+++ b/lib/editor/tinymce/upgrade.txt
@@ -7,6 +7,9 @@ information provided here is intended especially for developers.
 * added a new plugin to toggle the 2nd and 3rd toolbars
 * added a new plugin to wrap the toolbars on small screens.
 This plugin will be automatically added to existing toolbars by replacing the middle occurrence of | with "wrap".
+* New functions to make adding of new buttons easier:
+  - editor_tinymce_plugin::find_button()
+  - editor_tinymce_plugin::count_button_rows()
 
 === 2.5 ===