diff --git a/product/ERP5OOo/OOoTemplate.py b/product/ERP5OOo/OOoTemplate.py
index 4ab91f557799fbc34701301682f3ca8b0df1c07c..5728840a294876f078bfa723aee9da038263791d 100644
--- a/product/ERP5OOo/OOoTemplate.py
+++ b/product/ERP5OOo/OOoTemplate.py
@@ -472,7 +472,7 @@ xmlns:config="http://openoffice.org/2001/config" office:version="1.0">
     opts = extra_context.get("options", None)
     if opts is not None:
       format = opts.get('format', request.get('format', None))
-      if format is not None:
+      if format:
         return self._asFormat(ooo, format, request)
 
     # Do not send a RESPONSE if in batch_mode