diff --git a/modules/core/www/frontpage_config.php b/modules/core/www/frontpage_config.php
index f501d077b7b8edbc8a299add44cdb89105ba1982..7ef02e5ff351130adc3b48932ca27034700bcd32 100644
--- a/modules/core/www/frontpage_config.php
+++ b/modules/core/www/frontpage_config.php
@@ -136,6 +136,7 @@ $funcmatrix[] = array(
 );
 
 $funcmatrix[] = array(
+    'required' => 'optional',
     'descr' => 'Memcache or Memcached Extension (required if a Memcached backend is used)',
     'enabled' => class_exists('Memcache') || class_exists('Memcached'),
 );