diff --git a/product/ERP5/Document/Organisation.py b/product/ERP5/Document/Organisation.py
index 9c0f928b39726679f565b844ca624ff93f16f865..99b8e12bcbf84ac487b104e6ac7f24b25f9d85db 100644
--- a/product/ERP5/Document/Organisation.py
+++ b/product/ERP5/Document/Organisation.py
@@ -69,6 +69,7 @@ class Organisation(XMLObject):
                       , PropertySheet.Organisation
                       , PropertySheet.Mapping
                       , PropertySheet.Task
+                      , PropertySheet.Reference
                       )
 
 
diff --git a/product/ERP5/PropertySheet/Organisation.py b/product/ERP5/PropertySheet/Organisation.py
index 74c4eee8424c4f236a640eb0fea5f7bf7dcdb776..1db06b6ec5b3c669fb045f9f1fa9869a5ca65478 100644
--- a/product/ERP5/PropertySheet/Organisation.py
+++ b/product/ERP5/PropertySheet/Organisation.py
@@ -72,10 +72,6 @@ class Organisation:
       'description' : 'The geographic incorporate code of this organisation, sometimes derivated from corporate code',
       'type'        : 'string',
       'mode'        : 'w' },
-    { 'id'          : 'ean13_code',
-      'description' : 'The EAN 13 code of this organisation',
-      'type'        : 'string',
-      'mode'        : 'w' },
     { 'id'          : 'vat_code',
       'description' : 'The VAT (Value Added Tax) code of this organisation',
       'type'        : 'string',
diff --git a/product/ERP5/PropertySheet/Reference.py b/product/ERP5/PropertySheet/Reference.py
index 10ca2e41d81e695927771c84de568a0eb65c5957..0fb308b7ebea87a04e5b1b7e951fb8a4d79b78e7 100644
--- a/product/ERP5/PropertySheet/Reference.py
+++ b/product/ERP5/PropertySheet/Reference.py
@@ -39,6 +39,10 @@ class Reference:
             'type'        : 'string',
             'range'       : True,
             'mode'        : 'w' },
+        {   'id'          : 'ean13_code',
+            'description' : 'The EAN 13 code of this document',
+            'type'        : 'string',
+            'mode'        : 'w' },
         # WARNING: the naming is wrong because it conflicts with getSourceReference
         # which returns the reference of the source. Must be renamed as
         # source_specific_reference