diff --git a/account_statement_base_import/parser/file_parser.py b/account_statement_base_import/parser/file_parser.py
index 125605f2..ad810169 100644
--- a/account_statement_base_import/parser/file_parser.py
+++ b/account_statement_base_import/parser/file_parser.py
@@ -42,7 +42,7 @@ class FileParser(BankStatementImportParser):
         """
             :param char: parse_name: The name of the parser
             :param char: ftype: extension of the file (could be csv, xls or xlsx)
-            :param dict: extra_fields: extra fields to add to the conversion dict. In the format
+            :param dict: extra_fields: extra fields to put into the conversion dict. In the format
                                      {fieldname: fieldtype}
             :param list: header : specify header fields if the csv file has no header
             """
@@ -53,14 +53,7 @@ class FileParser(BankStatementImportParser):
         else:
             raise except_osv(_('User Error'),
                              _('Invalid file type %s. Please use csv, xls or xlsx') % ftype)
-        self.conversion_dict = {
-            'ref': unicode,
-            'label': unicode,
-            'date': datetime.datetime,
-            'amount': float_or_zero,
-        }
-        if extra_fields:
-            self.conversion_dict.update(extra_fields)
+        self.conversion_dict = extra_fields
         self.keys_to_validate = self.conversion_dict.keys()
         self.fieldnames = header
         self._datemode = 0  # used only for xls documents,
diff --git a/account_statement_base_import/parser/generic_file_parser.py b/account_statement_base_import/parser/generic_file_parser.py
index 81e51c8c..e60bedf9 100644
--- a/account_statement_base_import/parser/generic_file_parser.py
+++ b/account_statement_base_import/parser/generic_file_parser.py
@@ -24,6 +24,7 @@ import csv
 import tempfile
 import datetime
 from file_parser import FileParser
++from openerp.addons.account_statement_base_import.parser.file_parser import float_or_zero
 try:
     import xlrd
 except:
@@ -38,7 +39,13 @@ class GenericFileParser(FileParser):
     """
 
     def __init__(self, parse_name, ftype='csv', **kwargs):
-        super(GenericFileParser, self).__init__(parse_name, ftype=ftype, **kwargs)
+        conversion_dict = {
+            'ref': unicode,
+            'label': unicode,
+            'date': datetime.datetime,
+            'amount': float_or_zero,
+        }
+        super(GenericFileParser, self).__init__(parse_name, ftype=ftype, extra_fields=conversion_dict, **kwargs)
 
     @classmethod
     def parser_for(cls, parser_name):