diff --git a/core/Plugin/Manager.php b/core/Plugin/Manager.php
index da85369ac4cb20ee4a32d6557024e076e179fa9a..8278a3562a07c8449e4d8817f74b97aa409fc1eb 100644
--- a/core/Plugin/Manager.php
+++ b/core/Plugin/Manager.php
@@ -266,7 +266,7 @@ class Manager extends Singleton
      */
     public function installLoadedPlugins()
     {
-        $messages[] = array();
+        $messages = array();
         foreach ($this->getLoadedPlugins() as $plugin) {
             try {
                 $this->installPluginIfNecessary($plugin);