diff --git a/product/ERP5OOo/Document/OOoDocument.py b/product/ERP5OOo/Document/OOoDocument.py
index 38540116285e88f95f650c8d1a470cea366bcdf8..413eee5cebfb4c5fc7c2cee3aaba03beadad4af5 100644
--- a/product/ERP5OOo/Document/OOoDocument.py
+++ b/product/ERP5OOo/Document/OOoDocument.py
@@ -42,7 +42,7 @@ from Products.ERP5Type.Message import Message
 from Products.ERP5Type.Cache import CachingMethod
 from Products.ERP5Type.XMLObject import XMLObject
 from Products.ERP5.Document.File import File, stripHtml
-from Products.ERP5.Document.Document import ConversionCacheMixin
+from Products.ERP5.Document.Document import ConversionCacheMixin, ConversionError
 from Products.CMFCore.utils import getToolByName
 from Products.DCWorkflow.DCWorkflow import ValidationFailed
 
@@ -52,9 +52,6 @@ dec=base64.decodestring
 _MARKER = []
 
 
-class ConversionError(Exception):pass
-
-
 class OOoDocument(File, ConversionCacheMixin):
   """
     A file document able to convert OOo compatible files to