diff --git a/account_statement_base_completion/statement.py b/account_statement_base_completion/statement.py
index da850ec2..c5ca1f14 100644
--- a/account_statement_base_completion/statement.py
+++ b/account_statement_base_completion/statement.py
@@ -442,6 +442,25 @@ class AccountStatementLine(orm.Model):
         keys.sort()
         return keys
 
+    def _prepare_insert(self, statement, cols):
+        """ Apply column formating to prepare data for SQL inserting
+        Return a copy of statement
+        """
+        st_copy = statement
+        for k, col in st_copy.iteritems():
+            if k in cols:
+                st_copy[k] = self._columns[k]._symbol_set[1](col)
+        return st_copy
+
+    def _prepare_manyinsert(self, statement_store, cols):
+        """ Apply column formating to prepare multiple SQL inserts
+        Return a copy of statement_store
+        """
+        values = []
+        for statement in statement_store:
+            values.append(self._prepare_insert(statement, cols))
+        return values
+
     def _serialize_sparse_fields(self, cols, statement_store):
         """ Serialize sparse fields values in the target serialized field
         Return a copy of statement_store
@@ -471,6 +490,7 @@ class AccountStatementLine(orm.Model):
         statement_line_obj.check_access_rule(cr, uid, [], 'create')
         statement_line_obj.check_access_rights(cr, uid, 'create', raise_exception=True)
         cols = self._get_available_columns(statement_store, include_serializable=True)
+        statement_store = self._prepare_manyinsert(statement_store, cols)
         tmp_vals = (', '.join(cols), ', '.join(['%%(%s)s' % i for i in cols]))
         sql = "INSERT INTO account_bank_statement_line (%s) VALUES (%s);" % tmp_vals
         try:
@@ -489,6 +509,7 @@ class AccountStatementLine(orm.Model):
         from the ORM for records updating this kind of fields.
         """
         cols = self._get_available_columns([vals])
+        vals = self._prepare_insert(vals, cols)
         tmp_vals = (', '.join(['%s = %%(%s)s' % (i, i) for i in cols]))
         sql = "UPDATE account_bank_statement_line SET %s where id = %%(id)s;" % tmp_vals
         try: