diff --git modules/system/system.module modules/system/system.module
index 28e2e7b..0bab9d3 100644
--- modules/system/system.module
+++ modules/system/system.module
@@ -1059,7 +1059,7 @@ function system_library() {
     'website' => 'http://jquery.com',
     'version' => '1.4.2',
     'js' => array(
-      'misc/jquery.js' => array('weight' => JS_LIBRARY - 20),
+      'misc/jquery.js' => array('preprocess' => FALSE, 'weight' => JS_LIBRARY - 20),
     ),
   );