diff --git a/bin/report/interface.py b/bin/report/interface.py
index da94535498e..99b5860c3e0 100644
--- a/bin/report/interface.py
+++ b/bin/report/interface.py
@@ -86,6 +86,7 @@ class report_rml(report_int):
 
     def create(self, cr, uid, ids, datas, context):
         xml = self.create_xml(cr, uid, ids, datas, context)
+        xml = tools.ustr(xml).encode('utf8')
         if datas.get('report_type', 'pdf') == 'raw':
             return xml
         rml = self.create_rml(cr, xml, uid, context)