diff --git a/lib/Cake/Event/CakeEventManager.php b/lib/Cake/Event/CakeEventManager.php
index 77d283e76..3d6bf94f3 100644
--- a/lib/Cake/Event/CakeEventManager.php
+++ b/lib/Cake/Event/CakeEventManager.php
@@ -122,7 +122,7 @@ class CakeEventManager {
  * @return void
  */
 	protected function _attachSubscriber(CakeEventListener $subscriber) {
-		foreach ($subscriber->implementedEvents() as $eventKey => $function) {
+		foreach ((array)$subscriber->implementedEvents() as $eventKey => $function) {
 			$options = array();
 			$method = $function;
 			if (is_array($function) && isset($function['callable'])) {