diff --git a/admin/settings/appearance.php b/admin/settings/appearance.php
index 5e8ebd7f99e..41a172abc1e 100644
--- a/admin/settings/appearance.php
+++ b/admin/settings/appearance.php
@@ -120,6 +120,7 @@ if ($hassiteconfig) { // speedup for non-admins, add all caps used on this page
     $temp->add(new admin_setting_configcheckbox('enableajax', get_string('enableajax', 'admin'), get_string('configenableajax', 'admin'), 1));
     $temp->add(new admin_setting_configcheckbox('useexternalyui', get_string('useexternalyui', 'admin'), get_string('configuseexternalyui', 'admin'), 0));
     $temp->add(new admin_setting_configcheckbox('yuicomboloading', get_string('yuicomboloading', 'admin'), get_string('configyuicomboloading', 'admin'), 1));
+    $temp->add(new admin_setting_configcheckbox('cachejs', get_string('cachejs', 'admin'), get_string('cachejs_help', 'admin'), 1));
     $temp->add(new admin_setting_configcheckbox('disablecourseajax', get_string('disablecourseajax', 'admin'), get_string('configdisablecourseajax', 'admin'),
                                                 isset($CFG->disablecourseajax) ? 1 : empty($CFG->enableajax)));
     $ADMIN->add('appearance', $temp);
diff --git a/lang/en/admin.php b/lang/en/admin.php
index 57ccf6abae4..027aaba7ce9 100755
--- a/lang/en/admin.php
+++ b/lang/en/admin.php
@@ -76,6 +76,8 @@ $string['bookmarkadded'] = 'Bookmark added.';
 $string['bookmarkalreadyexists'] = 'You have already bookmarked this page.';
 $string['bookmarkdeleted'] = 'Bookmark deleted.';
 $string['bookmarkthispage'] = 'bookmark this page';
+$string['cachejs'] = 'Cache javascipt';
+$string['cachejs_help'] = 'Javascript caching and compression greatly improves page loading performance. it is strongly recommended for production sites. Developers will probably want to disable this feature.';
 $string['cachetext'] = 'Text cache lifetime';
 $string['cachetype'] = 'Cache Type';
 $string['calendarexportsalt'] = 'Calendar export salt';