diff --git a/flight/core/Dispatcher.php b/flight/core/Dispatcher.php
index 3bf27d4..6b5f81b 100644
--- a/flight/core/Dispatcher.php
+++ b/flight/core/Dispatcher.php
@@ -247,7 +247,7 @@ class Dispatcher
 
         $filteredCallable = $this->get($name);
 
-        if ($filteredCallable) {
+        if ($filteredCallable instanceof FilteredCallable) {
             if ($type === self::FILTER_BEFORE) {
                 $filteredCallable->pushBeforeFilter($callback);
             }