diff --git a/trytond/tools/convert.py b/trytond/tools/convert.py
index e5306159b6..60924b70f4 100644
--- a/trytond/tools/convert.py
+++ b/trytond/tools/convert.py
@@ -152,6 +152,8 @@ class RecordTagHandler:
         self.mh = master_handler
         # stock xml_id parsed in one module
         self.xml_ids = []
+        self.model = None
+        self.xml_id = None
 
 
     def startElement(self, name, attributes):