Changelog entry.

CHANGES.md

@@ -10,6 +10,7 @@ New Features:
 Fixed Issues:
 
 * [#9856](http://dev.ckeditor.com/ticket/9856): Fixed: Cannot use the native context menu together with the [Div Editing Area](http://ckeditor.com/addon/divarea) plugin. Thanks to [Mark Wade](https://github.com/mark-wade)!
+* [#12733](http://dev.ckeditor.com/ticket/12733): Fixed: Radio button onChange doesn't work in IE9+. Thanks to [Iliya Kostadinov](https://github.com/iliyakostadinov)!
 * [#13142](http://dev.ckeditor.com/ticket/13142): [Edge] Fixed: CTRL+A, backspace results in an empty div.
 * [#13599](http://dev.ckeditor.com/ticket/13599): Fixed: Cross-editor D&D of inline widget ends up in error/artifacts.
 * [#13640](http://dev.ckeditor.com/ticket/13640): [IE] Fixed: Dropping a widget outside body is not handled correctly.