X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=_source%2Fplugins%2Fundo%2Fplugin.js;h=89819f0d808ff71f3934fcb6e559a85e52ed5677;hb=4e70ea24db840898be8cc21c950363a52a2a6aba;hp=fb003c38521c028dcce4a0178a336bde031738f7;hpb=1056598c95187351dc58f4991d331e2258d038b5;p=ckeditor.git

diff --git a/_source/plugins/undo/plugin.js b/_source/plugins/undo/plugin.js
index fb003c3..89819f0 100644
--- a/_source/plugins/undo/plugin.js
+++ b/_source/plugins/undo/plugin.js
@@ -90,7 +90,7 @@ For licensing, see LICENSE.html or http://ckeditor.com/license
 			// Make the undo manager available only in wysiwyg mode.
 			editor.on( 'mode', function()
 				{
-					undoManager.enabled = editor.mode == 'wysiwyg';
+					undoManager.enabled = editor.readOnly ? false : editor.mode == 'wysiwyg';
 					undoManager.onChange();
 				});