diff --git a/lib/Alchemy/Phrasea/Command/Plugin/AddPlugin.php b/lib/Alchemy/Phrasea/Command/Plugin/AddPlugin.php
index 5f4f8b0da9..0cba6d047e 100644
--- a/lib/Alchemy/Phrasea/Command/Plugin/AddPlugin.php
+++ b/lib/Alchemy/Phrasea/Command/Plugin/AddPlugin.php
@@ -47,6 +47,8 @@ class AddPlugin extends AbstractPluginCommand
 
             $this->doInstallPlugin($source, $input, $output);
         }
+
+        return 0;
     }
 
     protected function shouldDownloadPlugin($source)