diff --git a/src/Illuminate/Foundation/Support/Providers/EventServiceProvider.php b/src/Illuminate/Foundation/Support/Providers/EventServiceProvider.php
index 4bc9468dd59b..adaf028108e0 100644
--- a/src/Illuminate/Foundation/Support/Providers/EventServiceProvider.php
+++ b/src/Illuminate/Foundation/Support/Providers/EventServiceProvider.php
@@ -40,7 +40,7 @@ public function register()
             $events = $this->getEvents();
 
             foreach ($events as $event => $listeners) {
-                foreach (array_unique($listeners) as $listener) {
+                foreach (array_unique($listeners, SORT_REGULAR) as $listener) {
                     Event::listen($event, $listener);
                 }
             }