diff --git a/lib/Alchemy/Phrasea/Plugin/Schema/Manifest.php b/lib/Alchemy/Phrasea/Plugin/Schema/Manifest.php
index <HASH>..<HASH> 100644
--- a/lib/Alchemy/Phrasea/Plugin/Schema/Manifest.php
+++ b/lib/Alchemy/Phrasea/Plugin/Schema/Manifest.php
@@ -67,7 +67,7 @@ class Manifest
 
     public function getServices()
     {
-        return $this->get('services');
+        return $this->get('services') ? : array();
     }
 
     public function getCommands()
Fix issue when services is not declared in manifest