diff --git a/main/inc/lib/plugin.class.php b/main/inc/lib/plugin.class.php
index 89541f87d4..83bc6cb9df 100755
--- a/main/inc/lib/plugin.class.php
+++ b/main/inc/lib/plugin.class.php
@@ -480,7 +480,7 @@ class Plugin
                     'visibility' => 1,
                     'admin' => 0,
                     'address' => 'squaregrey.gif',
-                    'added_tool' => 'NO',
+                    'added_tool' => 0,
                     'target' => '_self',
                     'category' => 'plugin',
                     'session_id' => 0