diff --git a/train.php b/train.php
index 3a89c8c6bc..3a31a4e194 100644
--- a/train.php
+++ b/train.php
@@ -89,7 +89,7 @@ class TrainAction extends Action
 
         $filter = null;
 
-        Event::handle('GetSpamFilter', &$filter);
+        Event::handle('GetSpamFilter', array(&$filter));
 
         if (empty($filter)) {
             throw new ServerException(_("No spam filter configured."));