diff --git a/model/activities.php b/model/activities.php
index 4194fe7..ca3a6ce 100644
--- a/model/activities.php
+++ b/model/activities.php
@@ -44,6 +44,12 @@ public function __construct(KObjectConfig $config)
         $state->sort = 'created_on';
     }
 
+    protected function _initialize(KObjectConfig $config)
+    {
+        $config->append(array('behaviors' => array('searchable')));
+        parent::_initialize($config);
+    }
+
     /**
      * Builds WHERE clause for the query.
      *