Index: /FCKeditor/trunk/_whatsnew.html
===================================================================
--- /FCKeditor/trunk/_whatsnew.html	(revision 2316)
+++ /FCKeditor/trunk/_whatsnew.html	(revision 2317)
@@ -60,4 +60,7 @@
 		<li>[<a target="_blank" href="http://dev.fckeditor.net/ticket/2422">#2422</a>] Czech   
 			language file has been updated.</li>
+		<li>[<a target="_blank" href="http://dev.fckeditor.net/ticket/2420">#2420</a>] Fixed the issue
+			where spelling mistake corrections made by the spell checking dialog are not undoable.
+			</li>
 	</ul>
 	<h3>
Index: /FCKeditor/trunk/editor/dialog/fck_spellerpages.html
===================================================================
--- /FCKeditor/trunk/editor/dialog/fck_spellerpages.html	(revision 2316)
+++ /FCKeditor/trunk/editor/dialog/fck_spellerpages.html	(revision 2317)
@@ -54,4 +54,5 @@
 	if ( numberOCorrections > 0 )
 	{
+		oEditor.FCKUndo.SaveUndoStep() ;
 		oEditor.FCK.EditorDocument.body.innerHTML = document.getElementById('txtHtml').value ;
 		if ( oEditor.FCKBrowserInfo.IsIE )