diff --git a/product/ERP5/PropertySheet/DocumentPreference.py b/product/ERP5/PropertySheet/DocumentPreference.py
index 0ee198cb6e7ed04db48db45662f9d0ff98d9718e..fb17fc9adba5e8f80eb1334f2d81aacb1319dee6 100644
--- a/product/ERP5/PropertySheet/DocumentPreference.py
+++ b/product/ERP5/PropertySheet/DocumentPreference.py
@@ -96,6 +96,13 @@ class DocumentPreference:
       'write_permission': 'Manage properties',
       'preference'  : 1,
       'mode'        : '' },
+    { 'id'          : 'preferred_synchronous_metadata_discovery',
+      'description' : 'Is preferred synchronous metadata discovery',
+      'type'        : 'boolean',
+      'write_permission': 'Manage properties',
+      'default'     : False,
+      'preference'  : 1,
+      'mode'        : '' },
     )
 
 # vim: shiftwidth=2