diff --git a/wagtail/wagtailadmin/templates/wagtailadmin/pages/_editor_js.html b/wagtail/wagtailadmin/templates/wagtailadmin/pages/_editor_js.html
index 61f9e89008..e171373b82 100644
--- a/wagtail/wagtailadmin/templates/wagtailadmin/pages/_editor_js.html
+++ b/wagtail/wagtailadmin/templates/wagtailadmin/pages/_editor_js.html
@@ -33,6 +33,9 @@
     <script src="{{ STATIC_URL }}admin/js/urlify.js"></script>
 {% endcompress %}
 
+{% comment %}
+    Put it outside compress to be sure that offline compression also works fine.
+{% endcomment %}
 {% get_localized_datepicker_js %}
 
 {% comment %}