diff --git a/modules/editor/skins/ckeditor/editor.html b/modules/editor/skins/ckeditor/editor.html
index 2c72b39b7..117ca37ff 100644
--- a/modules/editor/skins/ckeditor/editor.html
+++ b/modules/editor/skins/ckeditor/editor.html
@@ -137,7 +137,7 @@
 		CKEDITOR.dtd.$removeEmpty.ins = 0;
 
 		// Set the timestamp for plugins.
-		CKEDITOR.timestamp = {json_encode($filemtimestamp)};
+		CKEDITOR.timestamp = '{$filemtimestamp}';
 
 		// Add editor components.
 		<!--@if($enable_component)-->