Index: _source/plugins/liststyle/plugin.js
===================================================================
--- _source/plugins/liststyle/plugin.js	(revision 5534)
+++ _source/plugins/liststyle/plugin.js	(revision )
@@ -10,9 +10,14 @@
 		init : function( editor )
 		{
 
-			editor.addCommand( 'numberedListStyle', new CKEDITOR.dialogCommand( 'numberedListStyle' ) );
+			var numberedListStyle = new CKEDITOR.dialogCommand( 'numberedListStyle' );
+			numberedListStyle.canUndo = 1;
+			editor.addCommand( 'numberedListStyle', numberedListStyle );
 			CKEDITOR.dialog.add( 'numberedListStyle', this.path + 'dialogs/liststyle.js' );
-			editor.addCommand( 'bulletedListStyle', new CKEDITOR.dialogCommand( 'bulletedListStyle' ) );
+
+			var bulletedListStyle = new CKEDITOR.dialogCommand( 'bulletedListStyle' );
+			bulletedListStyle.canUndo = 1;
+			editor.addCommand( 'bulletedListStyle', bulletedListStyle );
 			CKEDITOR.dialog.add( 'bulletedListStyle', this.path + 'dialogs/liststyle.js' );
 
 			//Register map group;