diff -r 1a0ac419f714 -r bd1a76c91d5b src/java/de/uapcore/lightpit/LightPITModule.java
--- a/src/java/de/uapcore/lightpit/LightPITModule.java	Sat Mar 31 18:11:09 2018 +0200
+++ b/src/java/de/uapcore/lightpit/LightPITModule.java	Sat Mar 31 19:35:04 2018 +0200
@@ -89,6 +89,14 @@
     String titleKey() default "menuLabel";
     
     /**
+     * If set to <code>true</code>, this module is always loaded, but never
+     * visible in the menu or the Web UI module manager.
+     * 
+     * @return true, if this is a system module
+     */
+    boolean systemModule() default false;
+    
+    /**
      * Class representing the annotation.
      * This is necessary, because the EL resolver cannot deal with
      * annotation objects.